/* ============================================================
   SECUREBANK ONLINE — GLOBAL STYLES
   Phase 2: Authentication & Security
   ============================================================ */

/* CSS Variables — Light Theme */
:root {
    --primary: #0f172a;
    --primary-light: #1e293b;
    --primary-dark: #020617;
    --accent: #f59e0b;
    --accent-light: #fbbf24;
    --accent-dark: #d97706;
    --success: #10b981;
    --success-light: #34d399;
    --danger: #ef4444;
    --danger-light: #f87171;
    --warning: #f59e0b;
    --info: #3b82f6;
    --info-light: #60a5fa;

    --bg-body: #f1f5f9;
    --bg-card: rgba(255, 255, 255, 0.95);
    --bg-sidebar: #0f172a;
    --bg-header: #ffffff;
    --bg-input: #f8fafc;
    --bg-hover: #f1f5f9;
    --bg-glass: rgba(255, 255, 255, 0.15);

    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;
    --text-light: #cbd5e1;
    --text-white: #ffffff;

    --border: #e2e8f0;
    --border-light: #f1f5f9;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --shadow: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -2px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -4px rgba(0,0,0,0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.1), 0 8px 10px -6px rgba(0,0,0,0.1);
    --shadow-glow: 0 0 20px rgba(245, 158, 11, 0.3);

    --radius-sm: 6px;
    --radius: 10px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;

    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

    --transition-fast: 150ms ease;
    --transition: 300ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);

    --sidebar-width: 260px;
    --sidebar-collapsed: 72px;
    --header-height: 64px;
}

/* Dark Theme */
[data-theme="dark"] {
    --bg-body: #0f172a;
    --bg-card: rgba(30, 41, 59, 0.95);
    --bg-sidebar: #020617;
    --bg-header: #1e293b;
    --bg-input: #334155;
    --bg-hover: #334155;
    --bg-glass: rgba(30, 41, 59, 0.5);

    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --text-light: #475569;

    --border: #334155;
    --border-light: #1e293b;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.3);
    --shadow: 0 4px 6px -1px rgba(0,0,0,0.3), 0 2px 4px -2px rgba(0,0,0,0.3);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.3), 0 4px 6px -4px rgba(0,0,0,0.3);
}

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

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-sans);
    background: var(--bg-body);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    transition: background var(--transition), color var(--transition);
    overflow-x: hidden;
}

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

a:hover {
    color: var(--accent-light);
}

img {
    max-width: 100%;
    height: auto;
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-body);
}

::-webkit-scrollbar-thumb {
    background: var(--text-muted);
    border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-secondary);
}

/* Selection */
::selection {
    background: var(--accent);
    color: var(--primary);
}

/* ============================================================
   LAYOUT
   ============================================================ */

.page-wrapper {
    display: flex;
    min-height: 100vh;
}

.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    transition: margin-left var(--transition);
}

.main-content.expanded {
    margin-left: var(--sidebar-collapsed);
}

.content-area {
    padding: 24px 32px;
    padding-top: calc(var(--header-height) + 24px);
    min-height: 100vh;
}

@media (max-width: 1024px) {
    .main-content {
        margin-left: 0;
    }
    .content-area {
        padding: 20px;
        padding-top: calc(var(--header-height) + 20px);
    }
}

/* ============================================================
   GLASSMORPHISM
   ============================================================ */

.glass {
    background: var(--bg-glass);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.glass-card {
    background: var(--bg-card);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    transition: transform var(--transition), box-shadow var(--transition);
}

.glass-card:hover {
    box-shadow: var(--shadow-lg);
}

/* ============================================================
   AUTH PAGES (Login, Register, Reset)
   ============================================================ */

.auth-page {
    min-height: 100vh;
    display: flex;
    justify-content: center;
    position: relative;
    overflow-y: auto;           /* allow scrolling */
    padding: 40px 20px;
    align-items: flex-start;    /* anchor content to top instead of dead-center */
}

.auth-page::before {
    content: '';
    position: fixed;            /* change from absolute to fixed */
    inset: 0;
    background: 
        radial-gradient(circle at 20% 80%, rgba(245, 158, 11, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(59, 130, 246, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 50% 50%, rgba(16, 185, 129, 0.05) 0%, transparent 50%);
    animation: float-bg 20s ease-in-out infinite;
    pointer-events: none;       /* let clicks/scroll pass through */
    z-index: 0;
}

.auth-container {
    position: relative;
    z-index: 1;
    width: 100%;
    max-width: 440px;
    padding: 0 20px;
    margin: auto;               /* centers vertically when screen is tall */
    flex-shrink: 0;             /* prevents flexbox from squashing the card */
}

@keyframes float-bg {
    0%, 100% { transform: translate(0, 0) rotate(0deg); }
    33% { transform: translate(-2%, 2%) rotate(1deg); }
    66% { transform: translate(2%, -1%) rotate(-1deg); }
}



.auth-card {
    background: rgba(255, 255, 255, 0.97);
    border-radius: var(--radius-xl);
    padding: 40px;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25), 0 0 0 1px rgba(255,255,255,0.1);
    animation: slide-up 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

[data-theme="dark"] .auth-card {
    background: rgba(30, 41, 59, 0.97);
}

@keyframes slide-up {
    from {
        opacity: 0;
        transform: translateY(30px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.auth-logo {
    text-align: center;
    margin-bottom: 32px;
}

.auth-logo-icon {
    width: 64px;
    height: 64px;
    background: linear-gradient(135deg, var(--accent), var(--accent-dark));
    border-radius: var(--radius-lg);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    color: white;
    margin-bottom: 16px;
    box-shadow: var(--shadow-glow);
    animation: pulse-glow 2s ease-in-out infinite;
}

@keyframes pulse-glow {
    0%, 100% { box-shadow: 0 0 20px rgba(245, 158, 11, 0.3); }
    50% { box-shadow: 0 0 30px rgba(245, 158, 11, 0.5); }
}

.auth-logo h1 {
    font-size: 24px;
    font-weight: 700;
    color: var(--primary);
    letter-spacing: -0.5px;
}

[data-theme="dark"] .auth-logo h1 {
    color: var(--text-primary);
}

.auth-logo p {
    color: var(--text-secondary);
    font-size: 14px;
    margin-top: 4px;
}

.auth-divider {
    display: flex;
    align-items: center;
    margin: 24px 0;
    color: var(--text-muted);
    font-size: 13px;
}

.auth-divider::before,
.auth-divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--border);
}

.auth-divider span {
    padding: 0 16px;
}

.auth-footer {
    text-align: center;
    margin-top: 24px;
    font-size: 14px;
    color: var(--text-secondary);
}

.auth-footer a {
    font-weight: 600;
}

/* ============================================================
   FORMS
   ============================================================ */

.form-group {
    margin-bottom: 20px;
    position: relative;
}

.form-label {
    display: block;
    font-size: 13px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 6px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.form-label .required {
    color: var(--danger);
    margin-left: 2px;
}

.form-input {
    width: 100%;
    padding: 12px 16px;
    font-size: 15px;
    font-family: var(--font-sans);
    color: var(--text-primary);
    background: var(--bg-input);
    border: 2px solid var(--border);
    border-radius: var(--radius);
    transition: all var(--transition-fast);
    outline: none;
}

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

.form-input:focus {
    border-color: var(--accent);
    background: var(--bg-card);
    box-shadow: 0 0 0 4px rgba(245, 158, 11, 0.1);
}

.form-input.error {
    border-color: var(--danger);
    background: rgba(239, 68, 68, 0.05);
}

.form-input.error:focus {
    box-shadow: 0 0 0 4px rgba(239, 68, 68, 0.1);
}

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

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

.form-input-icon .form-input {
    padding-left: 44px;
}

.form-input-icon .icon {
    position: absolute;
    left: 14px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    font-size: 18px;
    pointer-events: none;
    transition: color var(--transition-fast);
}

.form-input-icon .form-input:focus + .icon,
.form-input-icon .form-input:not(:placeholder-shown) + .icon {
    color: var(--accent);
}

.form-input-icon .toggle-password {
    position: absolute;
    right: 14px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    cursor: pointer;
    font-size: 18px;
    background: none;
    border: none;
    padding: 0;
    transition: color var(--transition-fast);
}

.form-input-icon .toggle-password:hover {
    color: var(--accent);
}

.form-hint {
    font-size: 12px;
    color: var(--text-muted);
    margin-top: 4px;
}

.form-error {
    font-size: 12px;
    color: var(--danger);
    margin-top: 4px;
    display: flex;
    align-items: center;
    gap: 4px;
    animation: shake 0.4s ease-in-out;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    20% { transform: translateX(-4px); }
    40% { transform: translateX(4px); }
    60% { transform: translateX(-2px); }
    80% { transform: translateX(2px); }
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

@media (max-width: 480px) {
    .form-row {
        grid-template-columns: 1fr;
    }
}

/* Checkbox & Radio */
.form-check {
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    font-size: 14px;
    color: var(--text-secondary);
}

.form-check input[type="checkbox"],
.form-check input[type="radio"] {
    width: 18px;
    height: 18px;
    accent-color: var(--accent);
    cursor: pointer;
}

/* Select */
.form-select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' fill='%2364748b' viewBox='0 0 16 16'%3E%3Cpath d='M1.646 4.646a.5.5 0 0 1 .708 0L8 10.293l5.646-5.647a.5.5 0 0 1 .708.708l-6 6a.5.5 0 0 1-.708 0l-6-6a.5.5 0 0 1 0-.708z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 40px;
}

/* Textarea */
textarea.form-input {
    min-height: 120px;
    resize: vertical;
}

/* ============================================================
   BUTTONS
   ============================================================ */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    font-size: 15px;
    font-weight: 600;
    font-family: var(--font-sans);
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    transition: all var(--transition-fast);
    position: relative;
    overflow: hidden;
    white-space: nowrap;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.5s ease;
}

.btn:hover::before {
    left: 100%;
}

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

.btn-primary {
    background: linear-gradient(135deg, var(--accent), var(--accent-dark));
    color: white;
    box-shadow: 0 4px 14px rgba(245, 158, 11, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(245, 158, 11, 0.5);
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-secondary {
    background: var(--bg-input);
    color: var(--text-primary);
    border: 2px solid var(--border);
}

.btn-secondary:hover {
    background: var(--bg-hover);
    border-color: var(--text-muted);
}

.btn-success {
    background: linear-gradient(135deg, var(--success), #059669);
    color: white;
    box-shadow: 0 4px 14px rgba(16, 185, 129, 0.4);
}

.btn-success:hover {
    box-shadow: 0 6px 20px rgba(16, 185, 129, 0.5);
}

.btn-danger {
    background: linear-gradient(135deg, var(--danger), #dc2626);
    color: white;
    box-shadow: 0 4px 14px rgba(239, 68, 68, 0.4);
}

.btn-danger:hover {
    box-shadow: 0 6px 20px rgba(239, 68, 68, 0.5);
}

.btn-ghost {
    background: transparent;
    color: var(--text-secondary);
}

.btn-ghost:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

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

.btn-outline:hover {
    background: var(--accent);
    color: white;
}

.btn-sm {
    padding: 8px 16px;
    font-size: 13px;
}

.btn-lg {
    padding: 14px 32px;
    font-size: 16px;
}

.btn-block {
    width: 100%;
}

.btn-loading {
    pointer-events: none;
}

.btn-loading .btn-text {
    opacity: 0;
}

.btn-loading::after {
    content: '';
    position: absolute;
    width: 20px;
    height: 20px;
    border: 2px solid transparent;
    border-top-color: currentColor;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* ============================================================
   ALERTS & FLASH MESSAGES
   ============================================================ */

.alert {
    padding: 14px 18px;
    border-radius: var(--radius);
    font-size: 14px;
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 20px;
    animation: slide-down 0.3s ease;
}

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

.alert-success {
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.2);
    color: #065f46;
}

.alert-error {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.2);
    color: #991b1b;
}

.alert-warning {
    background: rgba(245, 158, 11, 0.1);
    border: 1px solid rgba(245, 158, 11, 0.2);
    color: #92400e;
}

.alert-info {
    background: rgba(59, 130, 246, 0.1);
    border: 1px solid rgba(59, 130, 246, 0.2);
    color: #1e40af;
}

[data-theme="dark"] .alert-success { color: #34d399; }
[data-theme="dark"] .alert-error { color: #f87171; }
[data-theme="dark"] .alert-warning { color: #fbbf24; }
[data-theme="dark"] .alert-info { color: #60a5fa; }

.alert-close {
    margin-left: auto;
    background: none;
    border: none;
    cursor: pointer;
    font-size: 18px;
    opacity: 0.6;
    transition: opacity var(--transition-fast);
}

.alert-close:hover {
    opacity: 1;
}

/* ============================================================
   TOAST NOTIFICATIONS
   ============================================================ */

.toast-container {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 9999;
    display: flex;
    flex-direction: column;
    gap: 10px;
    pointer-events: none;
}

.toast {
    background: var(--bg-card);
    border-radius: var(--radius);
    padding: 16px 20px;
    min-width: 320px;
    max-width: 420px;
    box-shadow: var(--shadow-xl);
    display: flex;
    align-items: center;
    gap: 12px;
    pointer-events: all;
    animation: toast-in 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    border-left: 4px solid var(--accent);
}

.toast.toast-out {
    animation: toast-out 0.3s ease forwards;
}

@keyframes toast-in {
    from {
        opacity: 0;
        transform: translateX(100px) scale(0.9);
    }
    to {
        opacity: 1;
        transform: translateX(0) scale(1);
    }
}

@keyframes toast-out {
    to {
        opacity: 0;
        transform: translateX(100px) scale(0.9);
    }
}

.toast-success { border-left-color: var(--success); }
.toast-error { border-left-color: var(--danger); }
.toast-warning { border-left-color: var(--warning); }
.toast-info { border-left-color: var(--info); }

.toast-icon {
    font-size: 20px;
    flex-shrink: 0;
}

.toast-success .toast-icon { color: var(--success); }
.toast-error .toast-icon { color: var(--danger); }
.toast-warning .toast-icon { color: var(--warning); }
.toast-info .toast-icon { color: var(--info); }

.toast-content {
    flex: 1;
}

.toast-title {
    font-weight: 600;
    font-size: 14px;
    margin-bottom: 2px;
}

.toast-message {
    font-size: 13px;
    color: var(--text-secondary);
}

.toast-close {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-muted);
    font-size: 16px;
    transition: color var(--transition-fast);
}

.toast-close:hover {
    color: var(--text-primary);
}

/* ============================================================
   LOADING & SKELETON
   ============================================================ */

.loading-overlay {
    position: fixed;
    inset: 0;
    background: rgba(15, 23, 42, 0.6);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9998;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition);
}

.loading-overlay.active {
    opacity: 1;
    visibility: visible;
}

.loading-spinner {
    width: 48px;
    height: 48px;
    border: 3px solid rgba(245, 158, 11, 0.2);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

.skeleton {
    background: linear-gradient(90deg, var(--border) 25%, var(--bg-hover) 50%, var(--border) 75%);
    background-size: 200% 100%;
    animation: skeleton-loading 1.5s ease-in-out infinite;
    border-radius: var(--radius);
}

@keyframes skeleton-loading {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* ============================================================
   UTILITIES
   ============================================================ */

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

.mt-1 { margin-top: 4px; }
.mt-2 { margin-top: 8px; }
.mt-3 { margin-top: 12px; }
.mt-4 { margin-top: 16px; }
.mt-5 { margin-top: 24px; }

.mb-1 { margin-bottom: 4px; }
.mb-2 { margin-bottom: 8px; }
.mb-3 { margin-bottom: 12px; }
.mb-4 { margin-bottom: 16px; }
.mb-5 { margin-bottom: 24px; }

.d-flex { display: flex; }
.align-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-2 { gap: 8px; }
.gap-3 { gap: 12px; }

.w-100 { width: 100%; }

.hidden { display: none !important; }

/* ============================================================
   ANIMATIONS
   ============================================================ */

@keyframes fade-in {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes fade-in-up {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.animate-fade-in {
    animation: fade-in 0.5s ease;
}

.animate-fade-in-up {
    animation: fade-in-up 0.5s ease;
}

/* ============================================================
   RESPONSIVE
   ============================================================ */

@media (max-width: 768px) {
    .auth-card {
        padding: 28px 24px;
    }

    .auth-logo h1 {
        font-size: 20px;
    }

    .btn-lg {
        padding: 12px 24px;
        font-size: 15px;
    }

    .toast {
        min-width: auto;
        max-width: calc(100vw - 40px);
        margin: 0 10px;
    }

    .toast-container {
        left: 10px;
        right: 10px;
    }
}