:root {
    /* Light theme variables */
    --primary-color-light: #333;
    --secondary-color-light: #666;
    --accent-color-light: #ff4f19;
    --background-color-light: #f5f5f5;
    --todo-background-light: #fff;
    --auth-background-light: #f0f0f0;
    --checkbox-border-light: #ddd;
    --day-section-bg-light: #f5f5f5;
    --today-bg-light: #e8e8e8;
    --input-bg-light: rgba(255, 255, 255, 0.1);
    --button-bg-light: rgba(255, 79, 25, 0.9);
    
    /* Day section gradients - Light */
    --day-past-light: #e2e2e2;  /* Disabled/past days */
    --day-bg-0-light: #e2e2e2;  /* Yesterday (Monday) - disabled */
    --day-bg-1-light: #f0f0f0;  /* Today (Tuesday) - lightest */
    --day-bg-2-light: #d0d0d0;  /* Tomorrow (Wednesday) - darker */
    --day-bg-3-light: #b8b8b8;  /* Thursday - even darker */
    --day-bg-4-light: #a0a0a0;  /* Friday - darker still */
    --day-bg-5-light: #888888;  /* Saturday - darkest */
    
    /* Dark theme variables */
    --primary-color-dark: #e0e0e0;
    --secondary-color-dark: #a0a0a0;
    --accent-color-dark: #ff6b3d;
    --background-color-dark: #1a1a1a;
    --todo-background-dark: #2d2d2d;
    --auth-background-dark: #2d2d2d;
    --checkbox-border-dark: #4d4d4d;
    --day-section-bg-dark: #2d2d2d;
    --today-bg-dark: #383838;
    --input-bg-dark: rgba(0, 0, 0, 0.2);
    --button-bg-dark: rgba(255, 107, 61, 0.9);
    
    /* Day section gradients - Dark */
    --day-past-dark: #252525;   /* Disabled/past days */
    --day-bg-0-dark: #252525;   /* Yesterday (Monday) - disabled */
    --day-bg-1-dark: #2d2d2d;   /* Today (Tuesday) - lightest */
    --day-bg-2-dark: #222222;   /* Tomorrow (Wednesday) - darker */
    --day-bg-3-dark: #1c1c1c;   /* Thursday - even darker */
    --day-bg-4-dark: #161616;   /* Friday - darker still */
    --day-bg-5-dark: #101010;   /* Saturday - darkest */
    
    /* Default to light theme */
    --primary-color: var(--primary-color-light);
    --secondary-color: var(--secondary-color-light);
    --accent-color: var(--accent-color-light);
    --background-color: var(--background-color-light);
    --todo-background: var(--todo-background-light);
    --auth-background: var(--auth-background-light);
    --checkbox-border: var(--checkbox-border-light);
    --day-section-bg: var(--day-section-bg-light);
    --today-bg: var(--today-bg-light);
    --input-bg: var(--input-bg-light);
    --button-bg: var(--button-bg-light);
    
    /* Day section gradients - Default */
    --day-past: var(--day-past-light);
    --day-bg-0: var(--day-bg-0-light);
    --day-bg-1: var(--day-bg-1-light);
    --day-bg-2: var(--day-bg-2-light);
    --day-bg-3: var(--day-bg-3-light);
    --day-bg-4: var(--day-bg-4-light);
    --day-bg-5: var(--day-bg-5-light);
    
    --border-radius: 12px;
    --transition-speed: 0.3s;
}

/* Dark mode styles */
[data-theme="dark"] {
    --primary-color: var(--primary-color-dark);
    --secondary-color: var(--secondary-color-dark);
    --accent-color: var(--accent-color-dark);
    --background-color: var(--background-color-dark);
    --todo-background: var(--todo-background-dark);
    --auth-background: var(--auth-background-dark);
    --checkbox-border: var(--checkbox-border-dark);
    --day-section-bg: var(--day-section-bg-dark);
    --today-bg: var(--today-bg-dark);
    --input-bg: var(--input-bg-dark);
    --button-bg: var(--button-bg-dark);
    
    /* Day section gradients - Dark mode */
    --day-past: var(--day-past-dark);
    --day-bg-0: var(--day-bg-0-dark);
    --day-bg-1: var(--day-bg-1-dark);
    --day-bg-2: var(--day-bg-2-dark);
    --day-bg-3: var(--day-bg-3-dark);
    --day-bg-4: var(--day-bg-4-dark);
    --day-bg-5: var(--day-bg-5-dark);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    transition: background-color var(--transition-speed), color var(--transition-speed), border-color var(--transition-speed);
}

body {
    background-color: var(--background-color);
    color: var(--primary-color);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
}

.screen {
    width: 100%;
    max-width: 500px;
}

.screen.hidden {
    display: none;
}

/* Theme Toggle Button */
.theme-toggle {
    position: fixed;
    top: 20px;
    right: 20px;
    background: transparent;
    color: var(--primary-color);
    border: none;
    padding: 8px;
    border-radius: 50%;
    cursor: pointer;
    font-size: 1rem;
    z-index: 1000;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-speed);
    backdrop-filter: blur(5px);
    opacity: 0.6;
}

.theme-toggle:hover {
    background-color: var(--input-bg);
    opacity: 1;
}

.theme-toggle svg {
    width: 16px;
    height: 16px;
    fill: none;
    stroke: currentColor;
    stroke-width: 2;
    stroke-linecap: round;
    stroke-linejoin: round;
    position: absolute;
    transition: transform var(--transition-speed), opacity var(--transition-speed);
}

.theme-toggle .sun {
    opacity: 0;
    transform: scale(0.5);
}

.theme-toggle .moon {
    opacity: 1;
    transform: scale(1);
}

[data-theme="dark"] .theme-toggle .sun {
    opacity: 1;
    transform: scale(1);
}

[data-theme="dark"] .theme-toggle .moon {
    opacity: 0;
    transform: scale(0.5);
}

.logout-btn {
    position: fixed;
    top: 20px;
    right: 70px;
    background: transparent;
    color: var(--primary-color);
    border: none;
    padding: 8px;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-size: 0.9rem;
    z-index: 1000;
    display: flex;
    align-items: center;
    transition: background-color var(--transition-speed);
    backdrop-filter: blur(5px);
}

.logout-btn:hover {
    background-color: var(--input-bg);
}

.logout-btn.hidden {
    display: none;
}

/* Auth Screen */
.auth-container {
    background: var(--auth-background);
    padding: 2rem;
    border-radius: var(--border-radius);
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.2);
    text-align: center;
}

.auth-container h1 {
    margin-bottom: 1rem;
    font-size: 2rem;
}

.auth-container p {
    color: var(--secondary-color);
    margin-bottom: 1.5rem;
}

#api-key, .region-select {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--checkbox-border);
    border-radius: var(--border-radius);
    margin-bottom: 1rem;
    font-size: 1rem;
    background: var(--input-bg);
    color: var(--primary-color);
    outline: none;
    backdrop-filter: blur(5px);
}

#api-key:focus, .region-select:focus {
    border-color: var(--accent-color);
}

#connect-btn {
    background: var(--button-bg);
    color: white;
    border: none;
    padding: 12px 24px;
    border-radius: var(--border-radius);
    font-size: 1rem;
    cursor: pointer;
    transition: background-color var(--transition-speed);
    backdrop-filter: blur(5px);
}

#connect-btn:hover {
    background-color: var(--accent-color);
}

.signup-note {
    margin-top: 2.5rem;
    font-size: 0.9rem;
    color: var(--secondary-color);
    line-height: 1.4;
    text-align: center;
    max-width: 450px;
    margin-left: auto;
    margin-right: auto;
}

.signup-note a {
    color: #ff4f19;
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition-speed);
}

.signup-note a:hover {
    text-decoration: underline;
}

/* Todo Screen */
.todo-container {
    background: var(--todo-background);
    border-radius: var(--border-radius);
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.2);
    overflow: hidden;
}

.days-container {
    display: flex;
    flex-direction: column;
}

.day-section {
    padding: 2rem;
    border-bottom: 1px solid rgba(128, 128, 128, 0.1);
    transition: all var(--transition-speed);
    opacity: 0.7;
    background: var(--day-section-bg);
}

/* Update day section backgrounds */
.day-section[data-index="0"] {
    background-color: var(--day-bg-0);
}

.day-section[data-index="1"] {
    background-color: var(--day-bg-1);
}

.day-section[data-index="2"] {
    background-color: var(--day-bg-2);
}

.day-section[data-index="3"] {
    background-color: var(--day-bg-3);
}

.day-section[data-index="4"] {
    background-color: var(--day-bg-4);
}

.day-section[data-index="5"] {
    background-color: var(--day-bg-5);
}

.day-section.today {
    opacity: 1;
    background-color: var(--today-bg);
}

.day-section.active {
    opacity: 1;
}

/* Remove the override for active state */
.day-section.today.active {
    opacity: 1;
}

.day-section.past {
    opacity: 0.8;
    background-color: var(--day-past);
    cursor: pointer;
}

.day-section.past .day-header {
    cursor: pointer;
}

.day-section.past .date {
    color: var(--secondary-color);
}

.day-section.past.active {
    opacity: 0.9;
}

.day-header {
    cursor: pointer;
    user-select: none;
}

.day-header h1 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.day-header .date {
    color: var(--secondary-color);
    font-size: 0.9rem;
}

.todo-list, .add-todo {
    overflow: hidden;
    max-height: 0;
    opacity: 0;
    transition: max-height var(--transition-speed) ease-out,
                opacity var(--transition-speed) ease-out,
                margin var(--transition-speed) ease-out;
    margin: 0;
}

.day-section.active .todo-list {
    max-height: 60vh;
    opacity: 1;
    margin: 1.5rem 0;
    overflow-y: auto;
}

.day-section.active .add-todo {
    max-height: 200px;
    opacity: 1;
    margin-top: 1.5rem;
}

/* Remove the display: none that was breaking the animation */
.day-section:not(.active) .todo-list,
.day-section:not(.active) .add-todo {
    max-height: 0;
    opacity: 0;
    margin: 0;
}

.todo-item {
    display: flex;
    align-items: center;
    padding: 1rem 0;
    border-bottom: 1px solid rgba(128, 128, 128, 0.1);
}

.todo-item.new-item {
    animation: slideIn var(--transition-speed) ease-out;
}

.todo-item:last-child {
    border-bottom: none;
}

.todo-checkbox {
    width: 24px;
    height: 24px;
    border: 2px solid var(--checkbox-border);
    border-radius: 6px;
    margin-right: 1rem;
    cursor: pointer;
    position: relative;
}

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

.todo-checkbox.checked::after {
    content: '✓';
    position: absolute;
    color: white;
    font-size: 16px;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.todo-text {
    flex: 1;
    font-size: 1rem;
}

.todo-item.done .todo-text {
    color: var(--secondary-color);
    text-decoration: line-through;
    text-decoration-color: var(--accent-color);
}

.priority-badge {
    padding: 4px 8px;
    border-radius: 12px;
    font-size: 0.8rem;
    margin-left: 1rem;
    opacity: 0.8;
}

.priority-high {
    background: #ffe5e5;
    color: #ff4f19;
}

.priority-low {
    background: #e5f6ff;
    color: #1976d2;
}

.add-todo {
    margin-top: 1.5rem;
}

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

.new-todo {
    flex: 1;
    padding: 12px;
    border: 1px solid var(--checkbox-border);
    border-radius: var(--border-radius);
    font-size: 1rem;
    background: var(--input-bg);
    color: var(--primary-color);
    outline: none;
    backdrop-filter: blur(5px);
}

.new-todo:focus {
    border-color: var(--accent-color);
}

.add-todo-btn {
    padding: 12px 24px;
    background: var(--button-bg);
    color: white;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: background-color var(--transition-speed);
    backdrop-filter: blur(5px);
}

.add-todo-btn:hover {
    background-color: var(--accent-color);
}

.priority-selector {
    display: flex;
    gap: 1rem;
}

.priority-btn {
    flex: 1;
    padding: 8px;
    border: 1px solid var(--checkbox-border);
    border-radius: var(--border-radius);
    background: var(--input-bg);
    cursor: pointer;
    color: var(--primary-color);
    backdrop-filter: blur(5px);
}

.priority-btn[data-priority="high"]:hover,
.priority-btn[data-priority="high"].selected {
    background: #ffe5e5;
    border-color: #ff4f19;
    color: #ff4f19;
}

.priority-btn[data-priority="low"]:hover,
.priority-btn[data-priority="low"].selected {
    background: #e5f6ff;
    border-color: #1976d2;
    color: #1976d2;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Responsive Design */
@media (max-width: 600px) {
    body {
        padding: 10px;
    }

    .day-section {
        padding: 1.5rem;
    }

    /* Fix theme toggle and logout button positioning on mobile */
    .theme-toggle {
        position: absolute;
        top: 20px;
        right: 20px;
    }

    .logout-btn {
        position: absolute;
        top: 20px;
        right: 70px;
    }

    .auth-container {
        margin-top: 80px; /* Add space for the fixed buttons */
        width: 100%;
        max-width: none;
        padding: 1.5rem;
    }

    /* Ensure inputs and buttons are properly sized on mobile */
    #api-key, 
    .region-select,
    #connect-btn {
        width: 100%;
        max-width: none;
        margin-bottom: 1rem;
    }
}

.delete-btn {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    border: none;
    background: transparent;
    color: var(--secondary-color);
    font-size: 20px;
    line-height: 1;
    cursor: pointer;
    margin-left: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0;
}

.delete-btn:hover {
    color: var(--accent-color);
}

.region-select {
    cursor: pointer;
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;
    background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right 1rem center;
    background-size: 1em;
    padding-right: 2.5rem;
}

.region-select option {
    background: var(--todo-background);
    color: var(--primary-color);
}