:root {
    --bg-dark: #05080c;
    --panel-bg: rgba(9, 15, 20, 0.75);
    --panel-border: rgba(16, 185, 129, 0.08);
    --input-bg: rgba(255, 255, 255, 0.02);
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --accent-indigo: #10b981;
    --accent-purple: #34d399;
    --accent-cyan: #2dd4bf;
    --accent-magenta: #84cc16;
    --priority-high: #f43f5e;
    --priority-medium: #fbbf24;
    --priority-low: #10b981;
    --radius-lg: 16px;
    --radius-md: 10px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', sans-serif;
}

body {
    background-color: var(--bg-dark);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
    position: relative;
}

/* Background glows */
.glow-bg {
    position: fixed;
    top: -10%;
    left: -10%;
    width: 60%;
    height: 60%;
    background: radial-gradient(circle, rgba(16, 185, 129, 0.08) 0%, rgba(0,0,0,0) 70%);
    z-index: -1;
    pointer-events: none;
}

body::after {
    content: '';
    position: fixed;
    bottom: -10%;
    right: -10%;
    width: 60%;
    height: 60%;
    background: radial-gradient(circle, rgba(45, 212, 191, 0.06) 0%, rgba(0,0,0,0) 70%);
    z-index: -1;
    pointer-events: none;
}

/* Stars decoration */
.stars-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        radial-gradient(white, rgba(255,255,255,.2) 2px, transparent 40px),
        radial-gradient(white, rgba(255,255,255,.15) 1px, transparent 30px);
    background-size: 550px 550px, 350px 350px;
    background-position: 0 0, 40px 60px;
    opacity: 0.15;
    z-index: -2;
    pointer-events: none;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2.5rem 1.5rem;
}

/* Glassmorphism Panel */
.glass-panel {
    background: var(--panel-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--panel-border);
    border-radius: var(--radius-lg);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.4);
}

/* Animations */
.fade-in {
    animation: fadeIn 0.5s ease-out forwards;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(12px); }
    to { opacity: 1; transform: translateY(0); }
}

.hidden {
    display: none !important;
}

/* Auth Section */
.auth-card {
    max-width: 460px;
    margin: 6rem auto;
    padding: 3rem;
    text-align: center;
}

.brand-title {
    font-family: 'Outfit', sans-serif;
    font-size: 2.2rem;
    font-weight: 800;
    margin-bottom: 0.5rem;
    background: linear-gradient(135deg, #34d399 0%, #10b981 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.magic-icon {
    font-size: 1.8rem;
    margin-right: 0.5rem;
    background: linear-gradient(135deg, #84cc16 0%, #10b981 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    display: inline-block;
    animation: pulseGlow 2.5s infinite alternate;
}

@keyframes pulseGlow {
    from { filter: drop-shadow(0 0 2px rgba(16, 185, 129, 0.3)); }
    to { filter: drop-shadow(0 0 10px rgba(52, 211, 153, 0.7)); }
}

.brand-subtitle {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 2.5rem;
}

.tab-buttons {
    display: flex;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--panel-border);
    border-radius: var(--radius-md);
    padding: 0.25rem;
    margin-bottom: 2rem;
}

.tab-btn {
    flex: 1;
    background: none;
    border: none;
    color: var(--text-secondary);
    padding: 0.75rem;
    font-weight: 600;
    cursor: pointer;
    border-radius: 8px;
    transition: var(--transition);
}

.tab-btn.active {
    background: var(--accent-indigo);
    color: var(--text-primary);
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.35);
}

.auth-form {
    display: none;
    flex-direction: column;
    text-align: left;
}

.auth-form.active {
    display: flex;
}

/* Inputs */
.input-group {
    margin-bottom: 1.5rem;
    display: flex;
    flex-direction: column;
}

.input-group label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.input-group label i {
    margin-right: 0.35rem;
}

.input-group input, 
.input-group textarea,
.input-group select {
    background: var(--input-bg);
    border: 1px solid var(--panel-border);
    border-radius: var(--radius-md);
    padding: 0.85rem 1rem;
    color: var(--text-primary);
    outline: none;
    transition: var(--transition);
}

.input-group input:focus, 
.input-group textarea:focus,
.input-group select:focus {
    border-color: var(--accent-indigo);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
    background: rgba(255, 255, 255, 0.06);
}

.input-group-row {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.input-group-half {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.input-group-half label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

/* Buttons */
.btn {
    border: none;
    border-radius: var(--radius-md);
    padding: 0.9rem 1.5rem;
    font-weight: 600;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    transition: var(--transition);
}

.primary-btn {
    background: linear-gradient(135deg, var(--accent-indigo) 0%, var(--accent-purple) 100%);
    color: var(--text-primary);
    box-shadow: 0 8px 20px rgba(99, 102, 241, 0.25);
}

.primary-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 25px rgba(99, 102, 241, 0.4);
}

.secondary-btn {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
    border: 1px solid var(--panel-border);
}

.secondary-btn:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-2px);
}

.ai-btn {
    background: linear-gradient(135deg, var(--accent-purple) 0%, var(--accent-cyan) 100%);
    color: var(--text-primary);
    box-shadow: 0 8px 20px rgba(168, 85, 247, 0.25);
    width: 100%;
}

.ai-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 25px rgba(6, 182, 212, 0.4);
}

.ai-btn:disabled, .primary-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none !important;
}

/* Alert messages */
.alert-message {
    margin-top: 1.5rem;
    padding: 0.85rem 1.25rem;
    border-radius: var(--radius-md);
    font-size: 0.9rem;
    text-align: left;
}

.alert-message.success {
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.2);
    color: #34d399;
}

.alert-message.error {
    background: rgba(244, 63, 94, 0.1);
    border: 1px solid rgba(244, 63, 94, 0.2);
    color: #fb7185;
}

/* Header */
.app-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.25rem 2rem;
    margin-bottom: 2rem;
}

.header-brand h2 {
    font-family: 'Outfit', sans-serif;
    font-weight: 700;
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--text-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.brand-logo-icon {
    color: var(--accent-indigo);
}

.header-user {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

#user-display-email {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.logout-btn {
    background: none;
    border: none;
    color: #f43f5e;
    font-weight: 600;
    cursor: pointer;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 0.35rem;
    transition: var(--transition);
}

.logout-btn:hover {
    color: #fda4af;
    transform: translateX(2px);
}

/* Dashboard Grid */
.dashboard-grid {
    display: grid;
    grid-template-columns: 420px 1fr;
    gap: 2rem;
}

.input-card {
    padding: 2rem;
    margin-bottom: 2rem;
}

.input-card h3 {
    font-family: 'Outfit', sans-serif;
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.panel-desc {
    color: var(--text-secondary);
    font-size: 0.85rem;
    margin-bottom: 1.5rem;
}

.form-actions {
    display: flex;
    justify-content: flex-end;
    gap: 0.75rem;
}

/* Tasks list */
.task-list-card {
    padding: 2rem;
    min-height: 500px;
}

.list-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--panel-border);
    padding-bottom: 1.25rem;
    margin-bottom: 1.5rem;
}

.list-header h3 {
    font-family: 'Outfit', sans-serif;
    font-size: 1.3rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.filter-controls {
    display: flex;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--panel-border);
    border-radius: var(--radius-md);
    padding: 0.15rem;
}

.filter-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    padding: 0.45rem 0.9rem;
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    border-radius: 6px;
    transition: var(--transition);
}

.filter-btn.active {
    background: rgba(255, 255, 255, 0.08);
    color: var(--text-primary);
}

/* Task Item Card */
.tasks-container {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.task-item {
    background: rgba(255, 255, 255, 0.015);
    border: 1px solid var(--panel-border);
    border-radius: var(--radius-md);
    padding: 1.25rem;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    transition: var(--transition);
}

.task-item:hover {
    border-color: rgba(99, 102, 241, 0.25);
    background: rgba(255, 255, 255, 0.025);
    transform: scale(1.005);
}

.task-main {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
}

.checkbox-container {
    display: flex;
    align-items: center;
    height: 24px;
}

.task-checkbox {
    appearance: none;
    width: 20px;
    height: 20px;
    border: 2px solid var(--text-secondary);
    border-radius: 5px;
    cursor: pointer;
    outline: none;
    display: grid;
    place-content: center;
    transition: var(--transition);
}

.task-checkbox:checked {
    border-color: var(--accent-cyan);
    background-color: var(--accent-cyan);
}

.task-checkbox:checked::before {
    content: "\f00c";
    font-family: "Font Awesome 6 Free";
    font-weight: 900;
    font-size: 0.75rem;
    color: var(--bg-dark);
}

.task-content {
    flex: 1;
}

.task-title-row {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.25rem;
}

.task-title {
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--text-primary);
}

.task-item.completed .task-title {
    text-decoration: line-through;
    color: var(--text-secondary);
}

.priority-tag {
    font-size: 0.75rem;
    font-weight: 700;
    padding: 0.15rem 0.5rem;
    border-radius: 4px;
    text-transform: uppercase;
}

.priority-tag.high {
    background: rgba(244, 63, 94, 0.1);
    color: var(--priority-high);
    border: 1px solid rgba(244, 63, 94, 0.2);
}

.priority-tag.medium {
    background: rgba(251, 191, 36, 0.1);
    color: var(--priority-medium);
    border: 1px solid rgba(251, 191, 36, 0.2);
}

.priority-tag.low {
    background: rgba(16, 185, 129, 0.1);
    color: var(--priority-low);
    border: 1px solid rgba(16, 185, 129, 0.2);
}

.task-description {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.4;
    white-space: pre-line;
}

.task-item.completed .task-description {
    color: rgba(148, 163, 184, 0.5);
}

/* Task Item Actions */
.task-actions {
    display: flex;
    justify-content: flex-end;
    align-items: center;
    gap: 0.5rem;
    border-top: 1px solid rgba(255, 255, 255, 0.03);
    padding-top: 0.75rem;
}

.action-btn {
    background: none;
    border: none;
    padding: 0.4rem 0.6rem;
    border-radius: 6px;
    font-size: 0.8rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.35rem;
    transition: var(--transition);
}

.edit-btn {
    color: var(--accent-indigo);
}
.edit-btn:hover {
    background: rgba(99, 102, 241, 0.08);
}

.delete-btn {
    color: var(--priority-high);
}
.delete-btn:hover {
    background: rgba(244, 63, 94, 0.08);
}

.rewrite-ai-btn {
    color: var(--accent-purple);
}
.rewrite-ai-btn:hover {
    background: rgba(168, 85, 247, 0.08);
}

.breakdown-ai-btn {
    color: var(--accent-cyan);
}
.breakdown-ai-btn:hover {
    background: rgba(6, 182, 212, 0.08);
}

/* Loading & Empty States */
.loading-state, .empty-state {
    text-align: center;
    padding: 3rem;
    color: var(--text-secondary);
    font-size: 0.95rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

.empty-state i {
    font-size: 2.5rem;
    color: rgba(255, 255, 255, 0.1);
}

/* Modals */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(5, 6, 13, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 100;
}

.modal-content {
    width: 100%;
    max-width: 550px;
    padding: 2rem;
    margin: 1.5rem;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--panel-border);
    padding-bottom: 1rem;
    margin-bottom: 1.25rem;
}

.modal-header h3 {
    font-family: 'Outfit', sans-serif;
    font-size: 1.2rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.close-modal-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 1.8rem;
    cursor: pointer;
    line-height: 1;
}

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

.modal-task-title {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 0.35rem;
}

.modal-task-desc {
    color: var(--text-secondary);
    font-size: 0.85rem;
    margin-bottom: 1.5rem;
    line-height: 1.4;
}

.subtask-list-title {
    font-weight: 600;
    font-size: 0.9rem;
    margin-bottom: 0.75rem;
    color: var(--text-primary);
}

.modal-subtasks-container {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    max-height: 250px;
    overflow-y: auto;
    padding-right: 0.5rem;
    margin-bottom: 1.5rem;
}

.modal-subtask-item {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--panel-border);
    border-radius: 6px;
    padding: 0.65rem 0.85rem;
    font-size: 0.85rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.modal-subtask-item i {
    color: var(--accent-cyan);
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 0.75rem;
    border-top: 1px solid var(--panel-border);
    padding-top: 1.25rem;
}

/* Purp glows */
.purple-glow {
    color: var(--accent-purple);
    filter: drop-shadow(0 0 5px rgba(168,85,247,0.5));
}

/* Responsive */
@media (max-width: 900px) {
    .dashboard-grid {
        grid-template-columns: 1fr;
    }
}