/* =============================================================================
   AUC MED APP - Design System
   Primary Color: #5A7F67 | Font: Cairo
   ============================================================================= */

/* Google Fonts - Cairo */
@import url('https://fonts.googleapis.com/css2?family=Cairo:wght@300;400;500;600;700;800&display=swap');

/* CSS Variables (Design Tokens) */
:root {
    /* Primary Colors */
    --primary-50: #e8f0eb;
    --primary-100: #c5dace;
    --primary-200: #9fc4ae;
    --primary-300: #79ad8e;
    --primary-400: #5c9b76;
    --primary-500: #5A7F67;
    --primary-600: #4a6a56;
    --primary-700: #3a5444;
    --primary-800: #2a3e33;
    --primary-900: #1a2821;

    /* Neutral Colors */
    --neutral-50: #f8faf9;
    --neutral-100: #f1f4f2;
    --neutral-200: #e3e8e5;
    --neutral-300: #c9d1cc;
    --neutral-400: #9ca89f;
    --neutral-500: #6f7d72;
    --neutral-600: #555f57;
    --neutral-700: #3d4540;
    --neutral-800: #252b27;
    --neutral-900: #141816;

    /* Accent Colors */
    --success: #22c55e;
    --success-light: #dcfce7;
    --warning: #eab308;
    --warning-light: #fef9c3;
    --error: #ef4444;
    --error-light: #fee2e2;
    --info: #3b82f6;
    --info-light: #dbeafe;

    /* Typography */
    --font-family: 'Cairo', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;

    /* Spacing */
    --spacing-1: 0.25rem;
    --spacing-2: 0.5rem;
    --spacing-3: 0.75rem;
    --spacing-4: 1rem;
    --spacing-5: 1.25rem;
    --spacing-6: 1.5rem;
    --spacing-8: 2rem;
    --spacing-10: 2.5rem;
    --spacing-12: 3rem;
    --spacing-16: 4rem;

    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(90, 127, 103, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(90, 127, 103, 0.1), 0 2px 4px -2px rgba(90, 127, 103, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(90, 127, 103, 0.1), 0 4px 6px -4px rgba(90, 127, 103, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(90, 127, 103, 0.1), 0 8px 10px -6px rgba(90, 127, 103, 0.1);
    --shadow-2xl: 0 25px 50px -12px rgba(90, 127, 103, 0.25);

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
    --transition-slow: 350ms ease;
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--neutral-800);
    background: linear-gradient(135deg, var(--primary-50) 0%, var(--neutral-50) 50%, var(--primary-100) 100%);
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Typography */
h1,
h2,
h3,
h4,
h5,
h6 {
    font-weight: 700;
    line-height: 1.3;
    color: var(--neutral-900);
}

h1 {
    font-size: var(--font-size-4xl);
}

h2 {
    font-size: var(--font-size-3xl);
}

h3 {
    font-size: var(--font-size-2xl);
}

h4 {
    font-size: var(--font-size-xl);
}

h5 {
    font-size: var(--font-size-lg);
}

h6 {
    font-size: var(--font-size-base);
}

p {
    margin-bottom: var(--spacing-4);
    color: var(--neutral-600);
}

a {
    color: var(--primary-500);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--primary-600);
}

/* Container */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-4);
}

/* =============================================================================
   Components
   ============================================================================= */

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-2);
    padding: var(--spacing-3) var(--spacing-6);
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    font-weight: 600;
    border: none;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-normal);
    text-decoration: none;
    white-space: nowrap;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-500) 0%, var(--primary-600) 100%);
    color: white;
    box-shadow: var(--shadow-md);
}

.btn-primary:hover:not(:disabled) {
    background: linear-gradient(135deg, var(--primary-600) 0%, var(--primary-700) 100%);
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

.btn-secondary {
    background: white;
    color: var(--primary-600);
    border: 2px solid var(--primary-200);
}

.btn-secondary:hover:not(:disabled) {
    background: var(--primary-50);
    border-color: var(--primary-400);
}

.btn-outline {
    background: transparent;
    color: var(--primary-500);
    border: 2px solid var(--primary-500);
}

.btn-outline:hover:not(:disabled) {
    background: var(--primary-500);
    color: white;
}

.btn-ghost {
    background: transparent;
    color: var(--neutral-600);
}

.btn-ghost:hover:not(:disabled) {
    background: var(--neutral-100);
    color: var(--neutral-800);
}

.btn-lg {
    padding: var(--spacing-4) var(--spacing-8);
    font-size: var(--font-size-lg);
}

.btn-sm {
    padding: var(--spacing-2) var(--spacing-4);
    font-size: var(--font-size-sm);
}

.btn-block {
    width: 100%;
}

.btn-icon {
    width: 44px;
    height: 44px;
    padding: 0;
    border-radius: var(--radius-full);
}

/* Cards */
.card {
    background: white;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    overflow: hidden;
    transition: all var(--transition-normal);
}

.card:hover {
    box-shadow: var(--shadow-xl);
    transform: translateY(-4px);
}

.card-header {
    padding: var(--spacing-6);
    border-bottom: 1px solid var(--neutral-100);
}

.card-body {
    padding: var(--spacing-6);
}

.card-footer {
    padding: var(--spacing-4) var(--spacing-6);
    background: var(--neutral-50);
    border-top: 1px solid var(--neutral-100);
}

/* Form Elements */
.form-group {
    margin-bottom: var(--spacing-5);
}

.form-label {
    display: block;
    margin-bottom: var(--spacing-2);
    font-weight: 600;
    color: var(--neutral-700);
    font-size: var(--font-size-sm);
}

.form-input {
    width: 100%;
    padding: var(--spacing-3) var(--spacing-4);
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    color: var(--neutral-800);
    background: white;
    border: 2px solid var(--neutral-200);
    border-radius: var(--radius-lg);
    transition: all var(--transition-fast);
    outline: none;
}

.form-input:focus {
    border-color: var(--primary-400);
    box-shadow: 0 0 0 3px rgba(90, 127, 103, 0.15);
}

.form-input::placeholder {
    color: var(--neutral-400);
}

.form-input:disabled {
    background: var(--neutral-100);
    cursor: not-allowed;
}

.form-input-icon {
    position: relative;
}

.form-input-icon .form-input {
    padding-left: 48px;
}

.form-input-icon .icon {
    position: absolute;
    left: 16px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--neutral-400);
    pointer-events: none;
    width: 20px;
    height: 20px;
}

.form-error {
    color: var(--error);
    font-size: var(--font-size-sm);
    margin-top: var(--spacing-1);
}

/* Alerts / Messages */
.alert {
    padding: var(--spacing-4);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
    margin-bottom: var(--spacing-4);
}

.alert-success {
    background: var(--success-light);
    color: #166534;
    border: 1px solid #86efac;
}

.alert-error {
    background: var(--error-light);
    color: #991b1b;
    border: 1px solid #fca5a5;
}

.alert-warning {
    background: var(--warning-light);
    color: #854d0e;
    border: 1px solid #fde047;
}

.alert-info {
    background: var(--info-light);
    color: #1e40af;
    border: 1px solid #93c5fd;
}

/* Badge */
.badge {
    display: inline-flex;
    align-items: center;
    padding: var(--spacing-1) var(--spacing-3);
    font-size: var(--font-size-xs);
    font-weight: 600;
    border-radius: var(--radius-full);
}

.badge-primary {
    background: var(--primary-100);
    color: var(--primary-700);
}

.badge-success {
    background: var(--success-light);
    color: #166534;
}

.badge-error {
    background: var(--error-light);
    color: #991b1b;
}

/* Avatar */
.avatar {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-full);
    background: linear-gradient(135deg, var(--primary-400), var(--primary-600));
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 700;
    font-size: var(--font-size-lg);
}

.avatar-sm {
    width: 36px;
    height: 36px;
    font-size: var(--font-size-sm);
}

.avatar-lg {
    width: 64px;
    height: 64px;
    font-size: var(--font-size-2xl);
}

/* Spinner / Loading */
.spinner {
    width: 24px;
    height: 24px;
    border: 3px solid var(--neutral-200);
    border-top-color: var(--primary-500);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

.loading-overlay {
    position: fixed;
    inset: 0;
    background: rgba(255, 255, 255, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    backdrop-filter: blur(4px);
}

/* Modal */
.modal-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
}

.modal-backdrop.active {
    opacity: 1;
    visibility: visible;
}

.modal {
    background: white;
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-2xl);
    width: 100%;
    max-width: 480px;
    max-height: 90vh;
    overflow-y: auto;
    transform: scale(0.9);
    transition: transform var(--transition-normal);
}

.modal-backdrop.active .modal {
    transform: scale(1);
}

.modal-header {
    padding: var(--spacing-6);
    border-bottom: 1px solid var(--neutral-100);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

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

.modal-footer {
    padding: var(--spacing-4) var(--spacing-6);
    background: var(--neutral-50);
    display: flex;
    gap: var(--spacing-3);
    justify-content: flex-end;
}

/* =============================================================================
   Layout Components
   ============================================================================= */

/* Header / Navbar */
.navbar {
    background: white;
    box-shadow: var(--shadow-sm);
    padding: var(--spacing-4) 0;
    position: sticky;
    top: 0;
    z-index: 100;
}

.navbar-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-4);
}

.navbar-brand {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--primary-600);
}

.navbar-brand svg,
.navbar-brand img {
    width: 32px;
    height: 32px;
    color: var(--primary-500);
    object-fit: contain;
}

.navbar-user {
    display: flex;
    align-items: center;
    gap: var(--spacing-4);
}

/* Grid System */
.grid {
    display: grid;
    gap: var(--spacing-6);
}

.grid-2 {
    grid-template-columns: repeat(2, 1fr);
}

.grid-3 {
    grid-template-columns: repeat(3, 1fr);
}

.grid-4 {
    grid-template-columns: repeat(4, 1fr);
}

@media (max-width: 1024px) {
    .grid-4 {
        grid-template-columns: repeat(2, 1fr);
    }

    .grid-3 {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 640px) {

    .grid-4,
    .grid-3,
    .grid-2 {
        grid-template-columns: 1fr;
    }
}

/* Sheet Card (Specific) */
.sheet-card {
    background: white;
    border-radius: var(--radius-xl);
    padding: var(--spacing-6);
    box-shadow: var(--shadow-md);
    cursor: pointer;
    transition: all var(--transition-normal);
    border: 2px solid transparent;
    position: relative;
    overflow: hidden;
}

.sheet-card::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary-100), transparent);
    border-radius: 0 0 0 100%;
}

.sheet-card:hover {
    border-color: var(--primary-300);
    box-shadow: var(--shadow-xl);
    transform: translateY(-4px);
}

.sheet-card-icon {
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, var(--primary-100), var(--primary-200));
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-4);
}

.sheet-card-icon svg {
    width: 28px;
    height: 28px;
    color: var(--primary-600);
}

.sheet-card-title {
    font-size: var(--font-size-lg);
    font-weight: 700;
    color: var(--neutral-800);
    margin-bottom: var(--spacing-2);
}

.sheet-card-meta {
    font-size: var(--font-size-sm);
    color: var(--neutral-500);
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
}

/* Auth Container */
.auth-wrapper {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-6);
    background: linear-gradient(135deg, var(--primary-600) 0%, var(--primary-800) 100%);
    position: relative;
    overflow: hidden;
}

.auth-wrapper::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, transparent 60%);
    animation: float 20s ease-in-out infinite;
}

.auth-wrapper::after {
    content: '';
    position: absolute;
    bottom: -50%;
    left: -50%;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.05) 0%, transparent 50%);
    animation: float 15s ease-in-out infinite reverse;
}

@keyframes float {

    0%,
    100% {
        transform: translate(0, 0);
    }

    50% {
        transform: translate(30px, 30px);
    }
}

.auth-container {
    background: white;
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-2xl);
    width: 100%;
    max-width: 440px;
    padding: var(--spacing-10);
    position: relative;
    z-index: 1;
}

.auth-logo {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin-bottom: var(--spacing-8);
}

.auth-logo svg,
.auth-logo img {
    width: 64px;
    height: 64px;
    color: var(--primary-500);
    margin-bottom: var(--spacing-3);
    object-fit: contain;
}

.auth-logo h1 {
    font-size: var(--font-size-2xl);
    color: var(--primary-700);
    text-align: center;
}

.auth-logo p {
    color: var(--neutral-500);
    text-align: center;
    margin-bottom: 0;
}

.tab-buttons {
    display: flex;
    gap: var(--spacing-2);
    margin-bottom: var(--spacing-6);
    background: var(--neutral-100);
    padding: var(--spacing-1);
    border-radius: var(--radius-lg);
}

.tab-btn {
    flex: 1;
    padding: var(--spacing-3);
    border: none;
    background: transparent;
    cursor: pointer;
    border-radius: var(--radius-md);
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    font-weight: 600;
    color: var(--neutral-500);
    transition: all var(--transition-fast);
}

.tab-btn.active {
    background: white;
    color: var(--primary-600);
    box-shadow: var(--shadow-sm);
}

.tab-btn:hover:not(.active) {
    color: var(--neutral-700);
}

.forgot-password {
    text-align: left;
    margin-top: calc(var(--spacing-2) * -1);
    margin-bottom: var(--spacing-4);
}

.forgot-password a {
    font-size: var(--font-size-sm);
    color: var(--primary-500);
}

/* Google Button & Separator */
.btn-google {
    background: white !important;
    color: var(--neutral-700) !important;
    border: 2px solid var(--neutral-200) !important;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-3);
}

.btn-google:hover {
    background: var(--neutral-50) !important;
    border-color: var(--neutral-300) !important;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.auth-separator {
    display: flex;
    align-items: center;
    text-align: center;
    margin: var(--spacing-6) 0;
    color: var(--neutral-400);
    font-size: var(--font-size-sm);
    font-weight: 600;
}

.auth-separator::before,
.auth-separator::after {
    content: '';
    flex: 1;
    border-bottom: 2px solid var(--neutral-100);
}

.auth-separator span {
    padding: 0 var(--spacing-4);
    color: var(--neutral-400);
}

/* Viewer Page */
.viewer-wrapper {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    background: var(--neutral-100);
}

.viewer-header {
    background: white;
    padding: var(--spacing-4);
    box-shadow: var(--shadow-sm);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.viewer-content {
    flex: 1;
    display: flex;
    align-items: stretch;
    justify-content: center;
    padding: var(--spacing-4);
}

.pdf-container {
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
    width: 100%;
    max-width: 900px;
    /* Security: Prevent selection/copying */
    user-select: none;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
}

.pdf-container iframe,
.pdf-container embed,
.pdf-container canvas {
    width: 100%;
    height: calc(100vh - 150px);
    border: none;
    pointer-events: auto;
}

/* Access Denied Modal */
.access-denied {
    text-align: center;
    padding: var(--spacing-10);
}

.access-denied svg {
    width: 80px;
    height: 80px;
    color: var(--error);
    margin-bottom: var(--spacing-6);
}

.access-denied h2 {
    color: var(--error);
    margin-bottom: var(--spacing-3);
}

.access-denied p {
    color: var(--neutral-600);
    margin-bottom: var(--spacing-6);
}

/* Utilities */
.hidden {
    display: none !important;
}

.text-center {
    text-align: center;
}

.text-right {
    text-align: right;
}

.text-left {
    text-align: left;
}

.text-primary {
    color: var(--primary-500);
}

.text-error {
    color: var(--error);
}

.text-success {
    color: var(--success);
}

.mt-4 {
    margin-top: var(--spacing-4);
}

.mt-6 {
    margin-top: var(--spacing-6);
}

.mb-4 {
    margin-bottom: var(--spacing-4);
}

.mb-6 {
    margin-bottom: var(--spacing-6);
}

.w-full {
    width: 100%;
}

/* Responsive */
@media (max-width: 640px) {
    .auth-container {
        padding: var(--spacing-6);
    }

    .auth-logo svg {
        width: 48px;
        height: 48px;
    }

    .auth-logo h1 {
        font-size: var(--font-size-xl);
    }
}