/* Git-Done - Modern Aesthetic Theme */
:root {
    /* Dark Theme (Default) */
    --bg-primary: #0a0e1a;
    --bg-secondary: #1a1f2e;
    --bg-tertiary: #252b3d;
    --bg-gradient: linear-gradient(135deg, #0a0e1a 0%, #1a1f2e 50%, #252b3d 100%);
    --text-primary: #ffffff;
    --text-secondary: #a0a9c0;
    --text-muted: #6b7280;
    --accent: #00d4aa;
    --accent-hover: #00b894;
    --accent-glow: rgba(0, 212, 170, 0.3);
    --danger: #ff6b6b;
    --danger-glow: rgba(255, 107, 107, 0.3);
    --warning: #ffd93d;
    --warning-glow: rgba(255, 217, 61, 0.3);
    --success: #6bcf7f;
    --border: #374151;
    --border-light: #4b5563;
    --glass-bg: rgba(26, 31, 46, 0.85);
    --glass-border: rgba(255, 255, 255, 0.1);
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 8px 25px rgba(0, 0, 0, 0.2);
    --shadow-glow: 0 0 20px var(--accent-glow);
    --font-mono: 'JetBrains Mono', 'SF Mono', 'Monaco', 'Inconsolata', 'Roboto Mono', monospace;
    --border-radius: 16px;
    --border-radius-sm: 8px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Light Theme */
[data-theme="light"] {
    --bg-primary: #f8fafc;
    --bg-secondary: #ffffff;
    --bg-tertiary: #f1f5f9;
    --bg-gradient: linear-gradient(135deg, #f8fafc 0%, #ffffff 50%, #f1f5f9 100%);
    --text-primary: #1e293b;
    --text-secondary: #475569;
    --text-muted: #94a3b8;
    --accent: #0891b2;
    --accent-hover: #0e7490;
    --accent-glow: rgba(8, 145, 178, 0.3);
    --danger: #dc2626;
    --danger-glow: rgba(220, 38, 38, 0.3);
    --warning: #d97706;
    --warning-glow: rgba(217, 119, 6, 0.3);
    --success: #16a34a;
    --border: #e2e8f0;
    --border-light: #cbd5e1;
    --glass-bg: rgba(255, 255, 255, 0.85);
    --glass-border: rgba(0, 0, 0, 0.1);
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 8px 25px rgba(0, 0, 0, 0.15);
    --shadow-glow: 0 0 20px var(--accent-glow);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Inter', Roboto, sans-serif;
    background: var(--bg-gradient);
    background-attachment: fixed;
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 12px;
}

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
    border-radius: 6px;
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-hover) 100%);
    border-radius: 6px;
    border: 2px solid var(--bg-secondary);
    transition: var(--transition);
}

::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(135deg, var(--accent-hover) 0%, var(--accent) 100%);
    box-shadow: 0 0 10px var(--accent-glow);
}

::-webkit-scrollbar-corner {
    background: var(--bg-secondary);
}

/* Firefox scrollbar */
* {
    scrollbar-width: thin;
    scrollbar-color: var(--accent) var(--bg-secondary);
}

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(circle at 20% 80%, rgba(0, 212, 170, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(255, 107, 107, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 40% 40%, rgba(255, 217, 61, 0.05) 0%, transparent 50%);
    pointer-events: none;
    z-index: -1;
}

.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 2rem;
    position: relative;
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 4rem;
    flex-wrap: wrap;
    gap: 2rem;
    position: relative;
}

.header-content {
    text-align: left;
    position: relative;
}

.auth-box {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    color: var(--text-secondary);
    background: var(--glass-bg);
    padding: 0.75rem 1.5rem;
    border-radius: var(--border-radius-sm);
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(20px);
}

.user-info span {
    font-weight: 500;
}

.btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border-light);
    padding: 0.75rem 1.5rem;
    border-radius: var(--border-radius-sm);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.btn-secondary::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
    transition: left 0.5s;
}

.btn-secondary:hover {
    background: var(--border-light);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

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

header h1 {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: 0.5rem;
    background: linear-gradient(135deg, var(--accent) 0%, #00b894 50%, #74b9ff 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    position: relative;
    letter-spacing: -0.02em;
}

header h1::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 0;
    width: 60px;
    height: 4px;
    background: linear-gradient(90deg, var(--accent), transparent);
    border-radius: 2px;
}

header p {
    color: var(--text-secondary);
    font-size: 1.2rem;
    font-weight: 400;
    opacity: 0.9;
}

.card {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius);
    padding: 2.5rem;
    margin-bottom: 2rem;
    backdrop-filter: blur(20px);
    box-shadow: var(--shadow-lg);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--accent), transparent);
    opacity: 0.5;
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg), var(--shadow-glow);
    border-color: var(--accent-glow);
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-hover) 100%);
    color: white;
    border: none;
    padding: 1rem 2rem;
    border-radius: var(--border-radius-sm);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    text-decoration: none;
    display: inline-block;
    box-shadow: var(--shadow-md);
}

.btn-primary::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;
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--accent-hover) 0%, var(--accent) 100%);
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg), 0 0 25px var(--accent-glow);
}

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

.btn-primary:active {
    transform: translateY(-1px);
}

#goal-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.input-group {
    position: relative;
    display: flex;
    flex-direction: column;
}

.input-label {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
    padding-left: 0.25rem;
}

#goal-form input {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--border-radius-sm);
    padding: 1rem 1.25rem;
    color: var(--text-primary);
    font-size: 1rem;
    transition: var(--transition);
    width: 100%;
}

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

#goal-form input:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow), var(--shadow-md);
    background: var(--bg-tertiary);
    transform: translateY(-1px);
}

#goal-form input:hover {
    border-color: var(--border-light);
}

/* Special styling for datetime-local input */
#goal-form input[type="datetime-local"] {
    color-scheme: dark;
}

#goal-form input[type="datetime-local"]::-webkit-calendar-picker-indicator {
    filter: invert(1);
    cursor: pointer;
    opacity: 0.8;
    transition: var(--transition);
}

#goal-form input[type="datetime-local"]::-webkit-calendar-picker-indicator:hover {
    opacity: 1;
    transform: scale(1.1);
}

/* Input focus animations */
.input-group input:focus + .input-label,
.input-group input:not(:placeholder-shown) + .input-label {
    color: var(--accent);
}

/* Better placeholder styling */
#goal-form input:focus::placeholder {
    opacity: 0.5;
    transform: translateX(4px);
}

/* Input validation styling */
#goal-form input:valid {
    border-color: var(--success);
}

#goal-form input:invalid:not(:focus):not(:placeholder-shown) {
    border-color: var(--danger);
    box-shadow: 0 0 0 2px rgba(255, 107, 107, 0.1);
}

.goal-widget {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius);
    padding: 2.5rem;
    margin-bottom: 2rem;
    text-align: center;
    backdrop-filter: blur(20px);
    box-shadow: var(--shadow-lg);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.goal-widget::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--accent), var(--accent-hover), var(--accent));
    opacity: 0.7;
}

.goal-widget:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg), 0 0 30px var(--accent-glow);
    border-color: var(--accent-glow);
}

.goal-widget h3 {
    font-size: 1.4rem;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
    font-weight: 600;
}

.goal-widget p {
    color: var(--text-secondary);
    margin-bottom: 1rem;
    font-size: 0.95rem;
}

.goal-widget a {
    color: var(--accent);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
}

.goal-widget a:hover {
    color: var(--accent-hover);
    text-decoration: underline;
}

.countdown {
    font-family: var(--font-mono);
    font-size: 3.5rem;
    font-weight: 800;
    color: var(--accent);
    margin: 2rem 0;
    text-shadow: 0 0 30px var(--accent-glow);
    letter-spacing: 0.05em;
    position: relative;
}

.countdown::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--accent), transparent);
    border-radius: 1px;
}

.countdown.urgent {
    color: var(--danger);
    text-shadow: 0 0 30px var(--danger-glow);
    animation: pulse 1.5s infinite;
}

.countdown.urgent::after {
    background: linear-gradient(90deg, transparent, var(--danger), transparent);
}

.countdown.completed {
    color: var(--success);
    text-shadow: 0 0 30px rgba(107, 207, 127, 0.3);
}

.goal-status {
    font-size: 1rem;
    color: var(--text-secondary);
    margin-top: 1.5rem;
    font-weight: 500;
}

.goal-status.completed {
    color: var(--success);
    font-weight: 600;
}

.hidden {
    display: none;
}

.embed-info {
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border);
    text-align: left;
}

.embed-info input {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--border-radius-sm);
    padding: 0.75rem;
    color: var(--text-primary);
    width: 100%;
    margin-top: 0.5rem;
    transition: var(--transition);
}

.embed-info input:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 2px var(--accent-glow);
}

.embed-info small {
    color: var(--text-muted);
    font-size: 0.8rem;
    margin-top: 0.5rem;
    display: block;
}

.login-prompt {
    text-align: center;
    max-width: 700px;
    margin: 0 auto;
    padding: 3rem 2rem;
}

.login-prompt h2 {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
    background: linear-gradient(135deg, var(--accent), var(--accent-hover));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.login-prompt p {
    margin-bottom: 1.5rem;
    color: var(--text-secondary);
    line-height: 1.7;
    font-size: 1.1rem;
}

/* Animations */
@keyframes pulse {
    0%, 100% { 
        opacity: 1; 
        transform: scale(1);
    }
    50% { 
        opacity: 0.8; 
        transform: scale(1.02);
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* Animation classes */
.fade-in-up {
    animation: fadeInUp 0.6s ease-out;
}

.slide-in-right {
    animation: slideInRight 0.6s ease-out;
}

/* Loading states */
.loading {
    position: relative;
    overflow: hidden;
}

.loading::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
    animation: shimmer 1.5s infinite;
}

@keyframes shimmer {
    0% { left: -100%; }
    100% { left: 100%; }
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 1rem;
    }
    
    header {
        flex-direction: column;
        text-align: center;
        gap: 1.5rem;
        margin-bottom: 3rem;
    }
    
    header h1 {
        font-size: 2.5rem;
    }
    
    header p {
        font-size: 1rem;
    }
    
    .card {
        padding: 1.5rem;
    }
    
    .goal-widget {
        padding: 2rem 1.5rem;
    }
    
    .countdown {
        font-size: 2.5rem;
    }
    
    .btn-primary {
        padding: 0.875rem 1.5rem;
        width: 100%;
    }
    
    #goal-form input {
        padding: 0.875rem 1rem;
        font-size: 0.95rem;
    }
    
    .input-label {
        font-size: 0.8rem;
    }
}

@media (max-width: 480px) {
    header h1 {
        font-size: 2rem;
    }
    
    .countdown {
        font-size: 2rem;
    }
    
    .card {
        padding: 1.25rem;
    }
    
    .goal-widget {
        padding: 1.5rem 1rem;
    }
}

/* Accessibility improvements */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Focus styles for better accessibility */
button:focus-visible,
input:focus-visible,
a:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

/* Theme Toggle Button */
.theme-toggle {
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
    margin-right: 1rem;
}

.theme-toggle-track {
    width: 60px;
    height: 30px;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 15px;
    position: relative;
    transition: var(--transition);
    backdrop-filter: blur(20px);
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.1);
}

.theme-toggle-thumb {
    width: 26px;
    height: 26px;
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-hover) 100%);
    border-radius: 50%;
    position: absolute;
    top: 2px;
    left: 2px;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
    transform: translateX(0);
}

.theme-toggle-thumb .sun-icon,
.theme-toggle-thumb .moon-icon {
    position: absolute;
    color: white;
    transition: var(--transition);
}

.theme-toggle-thumb .sun-icon {
    opacity: 0;
    transform: rotate(180deg) scale(0.5);
}

.theme-toggle-thumb .moon-icon {
    opacity: 1;
    transform: rotate(0deg) scale(1);
}

/* Light theme state */
[data-theme="light"] .theme-toggle-thumb {
    transform: translateX(30px);
    background: linear-gradient(135deg, #fbbf24 0%, #f59e0b 100%);
}

[data-theme="light"] .theme-toggle-thumb .sun-icon {
    opacity: 1;
    transform: rotate(0deg) scale(1);
}

[data-theme="light"] .theme-toggle-thumb .moon-icon {
    opacity: 0;
    transform: rotate(-180deg) scale(0.5);
}

.theme-toggle:hover .theme-toggle-track {
    box-shadow: 0 0 20px var(--accent-glow), inset 0 2px 4px rgba(0, 0, 0, 0.1);
    border-color: var(--accent-glow);
}

.theme-toggle:hover .theme-toggle-thumb {
    transform: translateX(0) scale(1.1);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3), 0 0 20px var(--accent-glow);
}

[data-theme="light"] .theme-toggle:hover .theme-toggle-thumb {
    transform: translateX(30px) scale(1.1);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3), 0 0 20px rgba(251, 191, 36, 0.5);
}

/* Theme transition animation */
* {
    transition: background-color var(--transition), 
                border-color var(--transition), 
                color var(--transition), 
                box-shadow var(--transition);
}

/* Light theme adjustments for specific elements */
[data-theme="light"] body::before {
    background: 
        radial-gradient(circle at 20% 80%, rgba(8, 145, 178, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(220, 38, 38, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 40% 40%, rgba(217, 119, 6, 0.05) 0%, transparent 50%);
}

[data-theme="light"] #goal-form input[type="datetime-local"] {
    color-scheme: light;
}

[data-theme="light"] #goal-form input[type="datetime-local"]::-webkit-calendar-picker-indicator {
    filter: invert(0);
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    :root {
        --bg-primary: #000000;
        --bg-secondary: #1a1a1a;
        --text-primary: #ffffff;
        --border: #666666;
    }
    
    [data-theme="light"] {
        --bg-primary: #ffffff;
        --bg-secondary: #f5f5f5;
        --text-primary: #000000;
        --border: #999999;
    }
}