/*
 * Reifen Späth - Lagerbestand App
 * Design System - Single Source of Truth
 * =============================================
 */

/* =============================================
   1. CSS Variables / Design Tokens
   ============================================= */
:root {
    /* Brand Colors */
    --color-primary: #dc2626;
    --color-primary-light: #ef4444;
    --color-primary-dark: #b91c1c;
    --color-secondary: #c0c0c0;
    
    /* Semantic Colors */
    --color-success: #22c55e;
    --color-success-light: #86efac;
    --color-warning: #fbbf24;
    --color-warning-light: #fde047;
    --color-error: #ef4444;
    --color-error-light: #f87171;
    --color-info: #60a5fa;
    --color-info-light: #93c5fd;
    
    /* Background Colors */
    --color-bg: #000000;
    --color-bg-gradient: linear-gradient(180deg, #000000 0%, #0a0a0a 100%);
    
    /* Surface Colors */
    --surface-primary: rgba(28, 28, 30, 0.95);
    --surface-secondary: rgba(44, 44, 46, 0.9);
    --surface-tertiary: rgba(58, 58, 60, 0.8);
    --surface-elevated: rgba(28, 28, 30, 0.8);
    
    /* Text Colors */
    --text-primary: #ffffff;
    --text-secondary: rgba(255, 255, 255, 0.7);
    --text-tertiary: rgba(255, 255, 255, 0.5);
    --text-muted: rgba(255, 255, 255, 0.5);
    --text-placeholder: rgba(255, 255, 255, 0.4);
    
    /* Border Colors */
    --border-default: rgba(255, 255, 255, 0.1);
    --border-light: rgba(255, 255, 255, 0.06);
    --border-focus: rgba(220, 38, 38, 0.5);
    
    /* Spacing Scale (4px base) */
    --space-1: 0.25rem;  /* 4px */
    --space-2: 0.5rem;   /* 8px */
    --space-3: 0.75rem;  /* 12px */
    --space-4: 1rem;     /* 16px */
    --space-5: 1.25rem;  /* 20px */
    --space-6: 1.5rem;   /* 24px */
    --space-8: 2rem;     /* 32px */
    --space-10: 2.5rem;  /* 40px */
    --space-12: 3rem;    /* 48px */
    
    /* Responsive spacing */
    --space-page-x: clamp(0.75rem, 2vw, 2rem);
    --space-page-y: clamp(1rem, 3vw, 2.5rem);
    
    /* Typography Scale */
    --font-family-base: 'Rajdhani', -apple-system, BlinkMacSystemFont, 'SF Pro Text', sans-serif;
    --font-family-heading: 'Orbitron', 'SF Pro Display', monospace;
    --font-family-mono: 'Orbitron', monospace;
    --font-family-emoji: "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji", sans-serif;
    
    --text-xs: 0.75rem;    /* 12px */
    --text-sm: 0.875rem;   /* 14px */
    --text-base: 1rem;     /* 16px - minimum for inputs */
    --text-lg: 1.125rem;   /* 18px */
    --text-xl: 1.25rem;    /* 20px */
    --text-2xl: 1.5rem;    /* 24px */
    --text-3xl: 1.875rem;  /* 30px */
    
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    
    --line-height-tight: 1.2;
    --line-height-normal: 1.5;
    --line-height-relaxed: 1.6;
    
    /* Border Radius */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 14px;
    --radius-xl: 20px;
    --radius-full: 9999px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.5);
    --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 20px rgba(220, 38, 38, 0.4);
    --shadow-btn-primary: 0 4px 12px rgba(220, 38, 38, 0.3);
    --shadow-btn-primary-hover: 0 6px 18px rgba(220, 38, 38, 0.4);
    
    /* Transitions */
    --ease-default: cubic-bezier(0.25, 0.1, 0.25, 1);
    --ease-out: cubic-bezier(0.25, 1, 0.5, 1);
    --ease-spring: cubic-bezier(0.175, 0.885, 0.32, 1.275);
    --duration-fast: 150ms;
    --duration-normal: 250ms;
    --duration-slow: 350ms;
    
    /* Touch Targets (Apple HIG minimum 44px) */
    --touch-target: 44px;
    --touch-target-sm: 36px;
    --touch-target-lg: 52px;
    
    /* Safe Areas */
    --safe-area-top: env(safe-area-inset-top, 0px);
    --safe-area-bottom: env(safe-area-inset-bottom, 0px);
    --safe-area-left: env(safe-area-inset-left, 0px);
    --safe-area-right: env(safe-area-inset-right, 0px);
    
    /* Z-Index Scale — values above Bootstrap's highest (1080) */
    --z-dropdown: 100;
    --z-sticky: 200;
    --z-modal-backdrop: 1100;
    --z-modal: 1200;
    --z-tooltip: 1300;
    --z-toast: 1400;
    
    /* Emoji sizing */
    --emoji-sm: 1rem;
    --emoji-md: 1.25rem;
    --emoji-lg: 1.5rem;
    --emoji-xl: 2rem;
}

/* =============================================
   2. Base Styles / Reset
   ============================================= */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
    -webkit-tap-highlight-color: transparent;
    text-size-adjust: 100%;
}

body {
    font-family: var(--font-family-base);
    background: var(--color-bg-gradient);
    color: var(--text-primary);
    line-height: var(--line-height-normal);
    min-height: 100vh;
    min-height: 100dvh;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overscroll-behavior-y: contain;
    font-size: max(16px, 1rem);
}

img, svg, video, iframe {
    display: block;
    max-width: 100%;
    height: auto;
}

a {
    color: var(--color-primary-light);
    text-decoration: none;
    transition: color var(--duration-fast) var(--ease-default);
}

a:hover {
    color: var(--color-primary);
}

a:active {
    opacity: 0.7;
}

/* =============================================
   3. Typography
   ============================================= */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-family-heading);
    color: var(--text-primary);
    line-height: var(--line-height-tight);
    font-weight: var(--font-weight-bold);
}

h1 { font-size: clamp(1.5rem, 5vw, 2.5rem); }
h2 { font-size: clamp(1.25rem, 4vw, 2rem); }
h3 { font-size: clamp(1.1rem, 3vw, 1.5rem); }
h4 { font-size: clamp(1rem, 2.5vw, 1.25rem); }

.metallic-text {
    background: linear-gradient(45deg, #c0c0c0, #ffffff, #c0c0c0);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* =============================================
   4. Form Controls
   ============================================= */
.form-control,
.form-select {
    width: 100%;
    min-height: var(--touch-target);
    padding: var(--space-3) var(--space-4);
    font-size: var(--text-base);
    font-family: var(--font-family-base);
    background-color: rgba(0, 0, 0, 0.3);
    border: 0.5px solid var(--border-default);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    -webkit-text-fill-color: var(--text-primary);
    transition: all var(--duration-fast) var(--ease-default);
    -webkit-appearance: none;
    appearance: none;
}

.form-control:focus,
.form-select:focus {
    outline: none;
    border-color: var(--border-focus);
    box-shadow: 0 0 0 3px rgba(220, 38, 38, 0.15);
    background-color: rgba(0, 0, 0, 0.4);
    color: var(--text-primary);
    -webkit-text-fill-color: var(--text-primary);
}

.form-control:-webkit-autofill,
.form-control:-webkit-autofill:hover,
.form-control:-webkit-autofill:focus {
    -webkit-text-fill-color: var(--text-primary);
    -webkit-box-shadow: 0 0 0 1000px rgba(0, 0, 0, 0.3) inset;
    transition: background-color 5000s ease-in-out 0s;
}

.form-control::placeholder {
    color: var(--text-placeholder);
}

.form-control:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.form-label {
    display: block;
    margin-bottom: var(--space-2);
    font-family: var(--font-family-base);
    font-size: var(--text-sm);
    font-weight: var(--font-weight-medium);
    color: var(--text-secondary);
}

textarea.form-control {
    resize: vertical;
    min-height: 80px;
}

/* Select dropdown styling */
select.form-control {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23ffffff' fill-opacity='0.5' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right var(--space-4) center;
    padding-right: calc(var(--space-4) * 2 + 12px);
    cursor: pointer;
}

select.form-control option {
    background: #1c1c1e;
    color: var(--text-primary);
}

/* Validation States */
.form-control.is-valid {
    border-color: rgba(34, 197, 94, 0.6);
}

.form-control.is-invalid {
    border-color: rgba(239, 68, 68, 0.6);
}

/* Form Layout Utilities */
.form-row-2col {
    display: grid;
    grid-template-columns: 1fr;
    gap: 0;
}

@media (min-width: 480px) {
    .form-row-2col {
        grid-template-columns: 1fr 1fr;
        gap: 1rem;
    }
}

/* =============================================
   5. Buttons
   ============================================= */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    min-height: var(--touch-target);
    min-width: var(--touch-target);
    padding: var(--space-3) var(--space-5);
    border: none;
    border-radius: var(--radius-md);
    font-family: var(--font-family-base);
    font-size: var(--text-sm);
    font-weight: var(--font-weight-semibold);
    text-decoration: none;
    cursor: pointer;
    transition: all var(--duration-fast) var(--ease-out);
    -webkit-tap-highlight-color: transparent;
    user-select: none;
}

.btn:active:not(:disabled) {
    transform: scale(0.97);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.btn-primary {
    background: linear-gradient(180deg, var(--color-primary-light) 0%, var(--color-primary) 100%);
    color: var(--text-primary);
    box-shadow: var(--shadow-btn-primary);
}

.btn-primary:hover:not(:disabled) {
    box-shadow: var(--shadow-btn-primary-hover);
    transform: translateY(-1px);
}

.btn-secondary {
    background: var(--surface-secondary);
    color: var(--text-primary);
    border: 0.5px solid var(--border-default);
}

.btn-secondary:hover:not(:disabled) {
    background: var(--surface-tertiary);
}

.btn-success {
    background: linear-gradient(180deg, #34d058 0%, var(--color-success) 100%);
    color: var(--text-primary);
    box-shadow: 0 2px 8px rgba(48, 209, 88, 0.3);
}

.btn-danger {
    background: linear-gradient(180deg, var(--color-error-light) 0%, var(--color-error) 100%);
    color: var(--text-primary);
    box-shadow: 0 2px 8px rgba(255, 69, 58, 0.3);
}

.btn-outline {
    background: transparent;
    color: var(--text-secondary);
    border: 1px solid var(--border-default);
}

.btn-outline:hover:not(:disabled) {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
    border-color: rgba(255, 255, 255, 0.2);
}

.btn-outline-primary {
    background: transparent;
    color: var(--color-primary-light);
    border: 1px solid rgba(220, 38, 38, 0.4);
}

.btn-outline-primary:hover:not(:disabled) {
    background: rgba(220, 38, 38, 0.1);
    color: var(--color-primary-light);
    border-color: rgba(220, 38, 38, 0.6);
}

.btn-lg {
    min-height: var(--touch-target-lg);
    padding: var(--space-4) var(--space-6);
    font-size: var(--text-base);
}

.btn-sm {
    min-height: var(--touch-target-sm);
    padding: var(--space-2) var(--space-3);
    font-size: var(--text-xs);
}

/* =============================================
   6. Cards
   ============================================= */
.card {
    background: var(--surface-primary);
    border: 0.5px solid var(--border-default);
    border-radius: var(--radius-lg);
    transition: all var(--duration-normal) var(--ease-default);
}

.card:hover {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-glow);
}

/* =============================================
   7. Alerts
   ============================================= */
.alert {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-4);
    border-radius: var(--radius-md);
    font-family: var(--font-family-base);
    font-size: var(--text-sm);
    border: 0.5px solid transparent;
}

.alert-danger {
    background: rgba(239, 68, 68, 0.12);
    border-color: rgba(239, 68, 68, 0.25);
    color: var(--color-error-light);
}

.alert-success {
    background: rgba(34, 197, 94, 0.12);
    border-color: rgba(34, 197, 94, 0.25);
    color: var(--color-success-light);
}

.alert-warning {
    background: rgba(251, 191, 36, 0.12);
    border-color: rgba(251, 191, 36, 0.25);
    color: var(--color-warning-light);
}

.alert-info {
    background: rgba(96, 165, 250, 0.12);
    border-color: rgba(96, 165, 250, 0.25);
    color: var(--color-info-light);
}

/* =============================================
   8. Badges
   ============================================= */
.badge {
    display: inline-flex;
    align-items: center;
    padding: var(--space-1) var(--space-2);
    font-family: var(--font-family-base);
    font-size: var(--text-xs);
    font-weight: var(--font-weight-semibold);
    border-radius: var(--radius-full);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.bg-success { background-color: var(--color-success) !important; color: #000; }
.bg-warning { background-color: var(--color-warning) !important; color: #000; }
.bg-danger { background-color: var(--color-error) !important; }
.bg-secondary { background-color: var(--surface-tertiary) !important; }

/* =============================================
   9. Auth States
   ============================================= */
.auth-loading,
.auth-redirect {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    min-height: 100dvh;
    padding: var(--space-6);
    text-align: center;
    gap: var(--space-4);
    font-family: var(--font-family-base);
    color: var(--text-tertiary);
}

.auth-loading .spinner-border {
    width: 2.5rem;
    height: 2.5rem;
    color: var(--color-primary);
}

.auth-redirect .auth-icon {
    font-size: 3rem;
}

.auth-redirect h2 {
    font-family: var(--font-family-base);
    font-size: var(--text-xl);
    color: var(--text-primary);
    margin: 0;
}

.auth-redirect p {
    color: var(--text-tertiary);
    margin: 0 0 var(--space-4) 0;
}

/* =============================================
   10. Modals
   ============================================= */
.global-modal-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.75);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    z-index: var(--z-modal-backdrop);
    animation: fadeIn var(--duration-fast) var(--ease-out);
}

.global-modal-container {
    position: fixed;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: var(--z-modal);
    padding: var(--space-4);
    padding-bottom: calc(var(--space-4) + var(--safe-area-bottom));
}

.global-modal-dialog {
    background: var(--surface-primary);
    border: 0.5px solid var(--border-default);
    border-radius: var(--radius-xl);
    width: 100%;
    max-width: 380px;
    max-height: calc(100vh - var(--space-8));
    max-height: calc(100dvh - var(--space-8));
    overflow-y: auto;
    box-shadow: var(--shadow-lg);
    animation: modalSlideIn var(--duration-normal) var(--ease-spring);
}

.global-modal-dialog-lg {
    max-width: 480px;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: scale(0.92) translateY(-16px);
    }
    to {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

.global-modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-5) var(--space-6);
    border-bottom: 0.5px solid var(--border-light);
}

.global-modal-header h3 {
    margin: 0;
    font-family: var(--font-family-base);
    font-size: var(--text-lg);
    font-weight: var(--font-weight-semibold);
}

.global-modal-close {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    background: rgba(255, 255, 255, 0.08);
    border: none;
    border-radius: 50%;
    color: var(--text-tertiary);
    font-size: var(--text-base);
    cursor: pointer;
    transition: all var(--duration-fast) var(--ease-default);
}

.global-modal-close:hover {
    background: rgba(255, 255, 255, 0.12);
    color: var(--text-primary);
}

.global-modal-body {
    padding: var(--space-6);
}

.global-modal-body p {
    margin: 0;
    font-family: var(--font-family-base);
    color: var(--text-secondary);
    text-align: center;
    line-height: var(--line-height-relaxed);
}

.global-modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: var(--space-3);
    padding: var(--space-4) var(--space-6);
    border-top: 0.5px solid var(--border-light);
}

.global-modal-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 64px;
    height: 64px;
    margin: 0 auto var(--space-5);
    border-radius: 50%;
}

.global-modal-icon-warning {
    background: rgba(239, 68, 68, 0.15);
    color: var(--color-error);
}

/* Modal Form Controls */
.global-modal-form-group {
    margin-bottom: var(--space-4);
}

.global-modal-form-label {
    display: block;
    margin-bottom: var(--space-2);
    font-family: var(--font-family-base);
    font-weight: var(--font-weight-medium);
    color: var(--text-secondary);
    font-size: var(--text-sm);
}

.global-modal-form-control {
    width: 100%;
    padding: var(--space-3) var(--space-4);
    background: rgba(0, 0, 0, 0.3);
    border: 0.5px solid var(--border-default);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-family: var(--font-family-base);
    font-size: var(--text-base);
    transition: all var(--duration-fast) var(--ease-default);
}

.global-modal-form-control:focus {
    outline: none;
    border-color: var(--border-focus);
    box-shadow: 0 0 0 3px rgba(220, 38, 38, 0.15);
}

.global-modal-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    min-height: var(--touch-target);
    padding: var(--space-3) var(--space-5);
    border-radius: var(--radius-md);
    font-family: var(--font-family-base);
    font-weight: var(--font-weight-semibold);
    font-size: var(--text-sm);
    cursor: pointer;
    transition: all var(--duration-fast) var(--ease-default);
    border: none;
}

.global-modal-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.global-modal-btn-secondary {
    background: rgba(255, 255, 255, 0.08);
    color: var(--text-primary);
    border: 0.5px solid var(--border-default);
}

.global-modal-btn-primary,
.global-modal-btn-danger {
    background: linear-gradient(180deg, var(--color-primary-light) 0%, var(--color-primary) 100%);
    color: var(--text-primary);
    box-shadow: var(--shadow-btn-primary);
}

/* =============================================
   10b. Universal Modal System

   Strategy: We use a CUSTOM class ".app-modal" instead of
   Bootstrap's ".modal" to completely avoid Bootstrap's
   .modal { display:none } and all other .modal rules.

   Dashboard keeps its own flat .modal pattern with scoped CSS
   and is NOT affected by these rules.

   .modal-dialog and .modal-content use !important on critical
   properties to guarantee they override Bootstrap regardless
   of load order, specificity, or caching.
   ============================================= */

/* Backdrop overlay */
.modal-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    z-index: var(--z-modal-backdrop, 900);
    animation: fadeIn var(--duration-fast, 150ms) var(--ease-out, cubic-bezier(0.25, 1, 0.5, 1));
}

/*
 * Custom modal overlay — replaces Bootstrap's .modal class.
 * By using .app-modal, Bootstrap's .modal{display:none} never applies.
 * This is a transparent full-screen overlay that captures clicks
 * for closing. The actual dialog is .modal-dialog inside it.
 */
.app-modal {
    position: fixed;
    inset: 0;
    z-index: var(--z-modal, 1000);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: visible;
    outline: none;
}

/*
 * Dialog container — centered in viewport.
 * !important on critical properties guarantees we beat
 * Bootstrap's .modal-dialog { pointer-events:none; position:relative }
 * regardless of specificity or cascade order.
 * Dashboard does NOT use .modal-dialog, so !important is safe.
 */
.modal-dialog {
    position: relative !important;
    width: calc(100% - 2rem);
    max-width: 520px;
    z-index: var(--z-modal, 1000);
    pointer-events: auto !important;
    margin: 0 !important;
}

.modal-dialog-sm {
    max-width: 380px;
}

.modal-dialog-lg {
    max-width: 640px;
}

/*
 * Visual dialog box.
 * !important on background to guarantee dark theme over
 * Bootstrap's .modal-content { background-color: #fff }.
 * Dashboard does NOT use .modal-content, so !important is safe.
 */
.modal-content {
    background: var(--surface-primary, rgba(28, 28, 30, 0.95)) !important;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 0.5px solid var(--border-default, rgba(255, 255, 255, 0.1)) !important;
    border-radius: var(--radius-xl, 20px) !important;
    width: 100%;
    max-height: calc(100vh - var(--space-8, 2rem));
    max-height: calc(100dvh - var(--space-8, 2rem));
    overflow-y: auto;
    box-shadow: var(--shadow-xl, 0 20px 40px rgba(0, 0, 0, 0.5));
    animation: modalSlideIn var(--duration-normal, 250ms) var(--ease-spring, cubic-bezier(0.175, 0.885, 0.32, 1.275));
    color: var(--text-primary, #ffffff) !important;
    pointer-events: auto !important;
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-5, 1.25rem) var(--space-6, 1.5rem);
    border-bottom: 0.5px solid var(--border-light, rgba(255, 255, 255, 0.06));
    gap: var(--space-4, 1rem);
}

.modal-header h3,
.modal-header h5,
.modal-title {
    margin: 0;
    font-family: var(--font-family-base);
    font-size: var(--text-lg);
    font-weight: var(--font-weight-semibold);
    color: var(--text-primary, #ffffff);
}

.modal-body {
    padding: var(--space-6, 1.5rem);
}

.modal-body .form-label {
    display: block;
    font-family: var(--font-family-base);
    font-weight: var(--font-weight-medium);
    color: var(--text-secondary, rgba(255, 255, 255, 0.7));
    font-size: var(--text-sm);
    margin-bottom: var(--space-2);
}

.modal-body .required {
    color: var(--color-error-light);
}

.modal-body .mb-3 {
    margin-bottom: var(--space-4);
}

.modal-footer {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
    padding: var(--space-4, 1rem) var(--space-6, 1.5rem);
    border-top: 0.5px solid var(--border-light, rgba(255, 255, 255, 0.06));
}

@media (min-width: 480px) {
    .modal-footer {
        flex-direction: row;
        justify-content: flex-end;
    }

    .modal-footer .btn {
        width: auto;
    }
}

@media (max-width: 479.98px) {
    .modal-footer .btn {
        width: 100%;
        justify-content: center;
    }
}

.btn-close {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    min-width: 32px;
    background: rgba(255, 255, 255, 0.08);
    border: none;
    border-radius: 50%;
    color: var(--text-tertiary);
    font-size: var(--text-base);
    cursor: pointer;
    transition: all var(--duration-fast) var(--ease-default);
}

.btn-close::before {
    content: '\00D7';
}

.btn-close:hover {
    background: rgba(255, 255, 255, 0.15);
    color: var(--text-primary);
}

.btn-close:active {
    transform: scale(0.9);
}

.btn-close:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* =============================================
   11. Spinners
   ============================================= */
.spinner-border {
    display: inline-block;
    width: 1.5rem;
    height: 1.5rem;
    border: 2px solid currentColor;
    border-right-color: transparent;
    border-radius: 50%;
    animation: spin 0.75s linear infinite;
    color: var(--color-primary);
}

.spinner-border-sm {
    width: 1rem;
    height: 1rem;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* =============================================
   12. Validation States
   ============================================= */
.valid.modified:not([type=checkbox]) {
    outline: 1px solid var(--color-success);
}

.invalid {
    outline: 1px solid var(--color-error);
}

.validation-message {
    color: var(--color-error-light);
    font-size: var(--text-sm);
    margin-top: var(--space-1);
}

/* =============================================
   13. Error Boundary
   ============================================= */
.blazor-error-boundary {
    background: rgba(239, 68, 68, 0.15);
    border: 1px solid rgba(239, 68, 68, 0.3);
    padding: var(--space-4);
    border-radius: var(--radius-md);
    color: var(--color-error-light);
}

.blazor-error-boundary::after {
    content: "Ein Fehler ist aufgetreten. Bitte laden Sie die Seite neu.";
}

/* =============================================
   14. Utility Classes
   ============================================= */
/* Text Colors */
.text-primary { color: var(--text-primary) !important; }
.text-secondary { color: var(--text-secondary) !important; }
.text-muted { color: var(--text-tertiary) !important; }
.text-success { color: var(--color-success) !important; }
.text-danger { color: var(--color-error) !important; }
.text-warning { color: var(--color-warning) !important; }

/* Text Alignment & Formatting */
.text-center { text-align: center; }
.text-break { word-break: break-all; }
.text-truncate {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* Font Weights */
.fw-bold { font-weight: var(--font-weight-bold); }
.fw-semibold { font-weight: var(--font-weight-semibold); }

/* Margins */
.mb-0 { margin-bottom: 0; }
.mb-2 { margin-bottom: var(--space-2); }
.mb-3 { margin-bottom: var(--space-4); }
.mb-4 { margin-bottom: var(--space-6); }
.mt-2 { margin-top: var(--space-2); }
.mt-3 { margin-top: var(--space-4); }
.mt-4 { margin-top: var(--space-6); }
.me-1 { margin-right: var(--space-1); }
.me-2 { margin-right: var(--space-2); }

/* Display */
.d-flex { display: flex; }
.d-block { display: block; }
.d-none { display: none; }

/* Flexbox */
.flex-column { flex-direction: column; }
.align-items-center { align-items: center; }
.justify-content-center { justify-content: center; }
.justify-content-between { justify-content: space-between; }
.gap-2 { gap: var(--space-2); }
.gap-3 { gap: var(--space-4); }
.gap-4 { gap: var(--space-6); }

/* Width */
.w-100 { width: 100%; }

/* Visually hidden but accessible */
.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* Skip Link for Accessibility (keyboard navigation) */
.skip-link {
    position: absolute;
    top: -100%;
    left: 50%;
    transform: translateX(-50%);
    z-index: 9999;
    padding: var(--space-3) var(--space-6);
    background: var(--color-primary);
    color: var(--text-primary);
    font-family: var(--font-family-base);
    font-weight: var(--font-weight-semibold);
    text-decoration: none;
    border-radius: var(--radius-md);
    transition: top var(--duration-fast) var(--ease-out);
}

.skip-link:focus {
    top: var(--space-4);
    outline: 2px solid var(--text-primary);
    outline-offset: 2px;
}

/* Visually hidden but focusable (for skip links) */
.visually-hidden-focusable:not(:focus):not(:focus-within) {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* =============================================
   15. Animations
   ============================================= */
@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(16px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    animation: fadeIn var(--duration-normal) var(--ease-out);
}

.slide-up {
    animation: slideUp var(--duration-normal) var(--ease-out);
}

/* =============================================
   16. Responsive Utilities
   ============================================= */

/* Table scroll wrapper */
.table-responsive {
    width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: thin;
    scrollbar-color: rgba(255, 255, 255, 0.15) transparent;
}

.table-responsive::-webkit-scrollbar {
    height: 6px;
}

.table-responsive::-webkit-scrollbar-track {
    background: rgba(0, 0, 0, 0.2);
    border-radius: 3px;
}

.table-responsive::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.15);
    border-radius: 3px;
}

/* Mobile-specific adjustments */
@media (max-width: 767.98px) {
    body {
        padding-left: var(--safe-area-left);
        padding-right: var(--safe-area-right);
    }
    
    .btn,
    button:not(.btn-icon-sm),
    [role="button"],
    select {
        min-height: var(--touch-target);
    }
    
    .form-control,
    .form-select {
        min-height: 48px;
        padding: 12px 14px;
        font-size: 16px;
    }
    
    .hide-mobile {
        display: none !important;
    }
    
    .flex-mobile-column {
        flex-direction: column !important;
    }
    
    .w-mobile-100 {
        width: 100% !important;
    }
}

@media (min-width: 768px) {
    .hide-desktop {
        display: none !important;
    }
}

/* Page container */
.page-container {
    width: 100%;
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--space-page-y) var(--space-page-x);
}

@media (max-width: 767.98px) {
    .page-container {
        padding: 1rem 0.75rem;
        padding-bottom: calc(1rem + var(--safe-area-bottom));
    }
}

/* Safe Areas for Notched Devices */
@supports (padding: env(safe-area-inset-top)) {
    .safe-area-top { padding-top: env(safe-area-inset-top); }
    .safe-area-bottom { padding-bottom: env(safe-area-inset-bottom); }
    .safe-area-x {
        padding-left: env(safe-area-inset-left);
        padding-right: env(safe-area-inset-right);
    }
}

/* =============================================
   17. Reduced Motion
   ============================================= */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* =============================================
   18. Print Styles
   ============================================= */
@media print {
    body {
        background: #fff;
        color: #000;
    }
    
    .btn,
    .global-modal-backdrop,
    .global-modal-container {
        display: none !important;
    }
}

/* =============================================
   19. Emoji & Symbol Styling
   ============================================= */
.emoji,
.icon-emoji,
.season-icon {
    font-family: var(--font-family-emoji);
    font-style: normal;
    font-weight: normal;
    line-height: 1;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.empty-icon,
.access-denied-icon,
.feature-icon {
    font-family: var(--font-family-emoji);
    font-size: var(--emoji-xl);
    line-height: 1;
    display: block;
    text-align: center;
}

.empty-icon,
.access-denied-icon {
    font-size: 3rem;
    margin-bottom: var(--space-4);
}

/* Access denied styling */
.access-denied {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 60vh;
    padding: var(--space-6);
    text-align: center;
    animation: fadeIn var(--duration-normal) var(--ease-out);
}

.access-denied h2 {
    font-family: var(--font-family-base);
    font-size: var(--text-xl);
    color: var(--text-primary);
    margin: var(--space-4) 0 var(--space-2);
}

.access-denied p {
    color: var(--text-tertiary);
    margin-bottom: var(--space-6);
    font-family: var(--font-family-base);
}

/* =============================================
   20. Global Responsive Grid Patterns
   ============================================= */

/* Auto-fit grid for cards/items - mobile first */
.responsive-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-4);
}

@media (min-width: 480px) {
    .responsive-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 768px) {
    .responsive-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (min-width: 1024px) {
    .responsive-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

/* Stats grid - for statistics cards */
.stats-grid-responsive {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-3);
}

@media (min-width: 768px) {
    .stats-grid-responsive {
        grid-template-columns: repeat(4, 1fr);
        gap: var(--space-4);
    }
}

/* Form row - side by side on desktop, stacked on mobile */
.form-row-responsive {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}

@media (min-width: 768px) {
    .form-row-responsive {
        flex-direction: row;
    }

    .form-row-responsive > * {
        flex: 1;
    }
}

/* Actions row - wrap on mobile */
.actions-responsive {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
}

@media (max-width: 479.98px) {
    .actions-responsive {
        flex-direction: column;
    }

    .actions-responsive > .btn {
        width: 100%;
        justify-content: center;
    }
}

/* Page header - title and actions */
.page-header-responsive {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
    margin-bottom: var(--space-6);
}

@media (min-width: 768px) {
    .page-header-responsive {
        flex-direction: row;
        justify-content: space-between;
        align-items: center;
    }
}

/* Modal content - responsive padding */
.modal-responsive {
    width: calc(100% - 1rem);
    max-width: 600px;
    max-height: calc(100vh - 2rem);
    margin: 0.5rem;
    padding: var(--space-4);
}

@media (min-width: 768px) {
    .modal-responsive {
        width: 90%;
        padding: var(--space-6);
        margin: 1rem auto;
    }
}

/* Two column layout - sidebar + main */
.layout-two-column {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}

@media (min-width: 1024px) {
    .layout-two-column {
        flex-direction: row;
    }

    .layout-two-column > .main-content {
        flex: 1;
        min-width: 0;
    }

    .layout-two-column > .sidebar-content {
        width: 320px;
        flex-shrink: 0;
    }
}

/* Kanban board - horizontal scroll on mobile */
.kanban-responsive {
    display: flex;
    gap: var(--space-4);
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
    padding-bottom: var(--space-2);
    scrollbar-width: thin;
    scrollbar-color: rgba(255, 255, 255, 0.15) transparent;
}

.kanban-responsive::-webkit-scrollbar {
    height: 6px;
}

.kanban-responsive::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.15);
    border-radius: 3px;
}

.kanban-responsive > .column {
    flex: 0 0 85vw;
    min-width: 280px;
    max-width: 320px;
    scroll-snap-align: start;
}

@media (min-width: 768px) {
    .kanban-responsive > .column {
        flex: 0 0 300px;
    }
}

@media (min-width: 1200px) {
    .kanban-responsive {
        overflow-x: visible;
    }

    .kanban-responsive > .column {
        flex: 1;
        max-width: none;
    }
}

/* Card grid inside modals */
.modal-card-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-3);
}

@media (min-width: 600px) {
    .modal-card-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Input group inline */
.input-group-responsive {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

@media (min-width: 480px) {
    .input-group-responsive {
        flex-direction: row;
    }

    .input-group-responsive > input,
    .input-group-responsive > select {
        flex: 1;
    }

    .input-group-responsive > .btn {
        flex-shrink: 0;
    }
}