/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* Pantone Color Palette */
:root {
    /* Pantone Colors */
    --retro-blue: #1a365d;        /* Deep teal-navy */
    --neon-flare: #ff4500;        /* Electric orange-red */
    --cherry-lacquer: #4a1a1a;    /* Blackened burgundy */
    --celestial-yellow: #ffd700;   /* Soft but radiant */
    
    /* Grounding Neutrals */
    --white: #ffffff;
    --light-gray: #f8fafc;
    --medium-gray: #64748b;
    --dark-gray: #334155;
    --black: #0f172a;
}

/* Typography - Bold and Large like hellohello.is */
body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', sans-serif;
    font-weight: 400;
    line-height: 1.4;
    color: var(--dark-gray);
    background: var(--light-gray);
    font-size: 18px;
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Header - Bold and Prominent */
.header {
    background: var(--retro-blue);
    color: var(--white);
    padding: 32px 0;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
}

/* Logo - Much Bigger and Bolder */
.logo h1 {
    font-size: 3.5rem;
    font-weight: 900;
    letter-spacing: -0.02em;
    margin: 0;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.logo p {
    font-size: 1.5rem;
    font-weight: 600;
    margin: 8px 0 0 0;
    opacity: 0.9;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--celestial-yellow);
}

.user-display {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-left: auto;
}

.user-name {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--white);
}

.user-switch-btn {
    padding: 8px 16px;
    background: rgba(255, 255, 255, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 8px;
    color: var(--white);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
}

.user-switch-btn:hover {
    background: rgba(255, 255, 255, 0.3);
    border-color: rgba(255, 255, 255, 0.5);
}

/* Progress Summary - Bigger Numbers */
.progress-summary {
    display: flex;
    gap: 48px;
    align-items: center;
}

.streak, .completion {
    text-align: center;
}

.streak-number, .completion-number {
    display: block;
    font-size: 3rem;
    font-weight: 900;
    line-height: 1;
    color: var(--celestial-yellow);
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.streak-label, .completion-label {
    font-size: 1rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    opacity: 0.8;
    margin-top: 8px;
}

/* Progress Bar - Bolder */
.progress-bar {
    width: 100%;
    height: 8px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 4px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: var(--celestial-yellow);
    border-radius: 4px;
    transition: width 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 0 16px rgba(255, 215, 0, 0.4);
}

/* Main Content */
.main {
    padding: 64px 0;
    min-height: calc(100vh - 200px);
}

/* Login Screen Styles */
.login-card {
    background: var(--white);
    border-radius: 24px;
    padding: 64px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.1);
    max-width: 600px;
    margin: 0 auto;
    text-align: center;
}

.login-header h1 {
    font-size: 3.5rem;
    font-weight: 800;
    color: var(--retro-blue);
    margin-bottom: 16px;
    line-height: 1.1;
}

.login-header p {
    font-size: 1.5rem;
    color: var(--text-secondary);
    margin-bottom: 48px;
}

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

.input-group {
    margin-bottom: 32px;
}

.input-group label {
    display: block;
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--retro-blue);
    margin-bottom: 12px;
}

.input-group input {
    width: 100%;
    padding: 20px 24px;
    font-size: 1.25rem;
    border: 3px solid var(--border-color);
    border-radius: 16px;
    background: var(--white);
    transition: all 0.3s ease;
    font-family: inherit;
}

.input-group input:focus {
    outline: none;
    border-color: var(--neon-flare);
    box-shadow: 0 0 0 4px rgba(255, 69, 0, 0.1);
}

.user-list {
    margin: 32px 0;
    padding: 24px;
    background: var(--background-light);
    border-radius: 16px;
}

.user-list h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--retro-blue);
    margin-bottom: 16px;
}

.user-button {
    display: block;
    width: 100%;
    padding: 16px 20px;
    margin-bottom: 12px;
    background: var(--white);
    border: 2px solid var(--border-color);
    border-radius: 12px;
    font-size: 1.125rem;
    font-weight: 500;
    color: var(--text-primary);
    cursor: pointer;
    transition: all 0.3s ease;
    text-align: left;
}

.user-button:hover {
    border-color: var(--neon-flare);
    background: rgba(255, 69, 0, 0.05);
}

.user-button:last-child {
    margin-bottom: 0;
}

.login-actions {
    text-align: center;
    margin-top: 32px;
}

/* Login Form */
.login-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
    max-width: 400px;
    margin: 0 auto;
}

.login-form label {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--retro-blue);
    margin-bottom: 8px;
}

.login-form input {
    padding: 16px 20px;
    font-size: 1.125rem;
    border: 2px solid var(--light-gray);
    border-radius: 12px;
    background: var(--white);
    color: var(--dark-gray);
    transition: all 0.3s ease;
}

.login-form input:focus {
    outline: none;
    border-color: var(--retro-blue);
    box-shadow: 0 0 0 3px rgba(26, 54, 93, 0.1);
}

.login-btn {
    padding: 16px 32px;
    font-size: 1.125rem;
    font-weight: 600;
    background: var(--neon-flare);
    color: var(--white);
    border: none;
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.login-btn:hover {
    background: #e63e00;
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(255, 69, 0, 0.3);
}

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

/* Login Divider */
.login-divider {
    display: flex;
    align-items: center;
    margin: 32px 0;
    color: var(--medium-gray);
}

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

.login-divider span {
    padding: 0 16px;
    font-size: 0.875rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Custom User Section */
.custom-user {
    text-align: left;
}

.custom-user label {
    display: block;
    font-size: 1rem;
    font-weight: 600;
    color: var(--retro-blue);
    margin-bottom: 8px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.custom-user input {
    width: 100%;
    padding: 16px 20px;
    border: 2px solid var(--light-gray);
    border-radius: 12px;
    font-size: 1.125rem;
    font-weight: 500;
    background: var(--white);
    transition: all 0.3s ease;
    margin-bottom: 16px;
}

.custom-user input:focus {
    outline: none;
    border-color: var(--retro-blue);
    box-shadow: 0 0 0 3px rgba(26, 54, 93, 0.1);
}

.custom-user button {
    width: 100%;
    padding: 16px 24px;
    background: var(--neon-flare);
    color: var(--white);
    border: none;
    border-radius: 12px;
    font-size: 1.125rem;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.custom-user button:hover {
    background: #e55100;
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(255, 69, 0, 0.3);
}

/* Welcome Card - Bold and Prominent */
.welcome-card {
    background: var(--white);
    border-radius: 24px;
    padding: 64px;
    text-align: center;
    box-shadow: 0 20px 64px rgba(0, 0, 0, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    max-width: 800px;
    margin: 0 auto;
}

.welcome-card h2 {
    font-size: 3rem;
    font-weight: 900;
    color: var(--retro-blue);
    margin-bottom: 32px;
    line-height: 1.1;
    letter-spacing: -0.02em;
}

.welcome-card p {
    font-size: 1.25rem;
    line-height: 1.6;
    color: var(--medium-gray);
    margin-bottom: 48px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* Calendar Container */
.calendar-container {
    background: var(--white);
    border-radius: 24px;
    padding: 64px;
    box-shadow: 0 20px 64px rgba(0, 0, 0, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.calendar-header {
    text-align: center;
    margin-bottom: 64px;
}

.calendar-header h2 {
    font-size: 4rem;
    font-weight: 900;
    color: var(--retro-blue);
    margin-bottom: 16px;
    letter-spacing: -0.02em;
}

.calendar-header p {
    font-size: 1.25rem;
    color: var(--medium-gray);
    font-weight: 500;
}

/* Calendar Grid - Much Bigger Numbers */
.calendar-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 16px;
    max-width: 800px;
    margin: 0 auto;
}

.calendar-header-day {
    font-weight: 700;
    color: var(--medium-gray);
    text-align: center;
    padding: 16px;
    font-size: 1rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.calendar-day {
    aspect-ratio: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    font-weight: 900;
    border-radius: 16px;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border: 3px solid transparent;
    position: relative;
    overflow: hidden;
}

.calendar-day:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.15);
}

.calendar-day.completed {
    background: var(--neon-flare);
    color: var(--white);
    box-shadow: 0 8px 24px rgba(255, 69, 0, 0.3);
}

.calendar-day.completed::after {
    content: '✓';
    position: absolute;
    top: 8px;
    right: 8px;
    font-size: 1rem;
    opacity: 0.8;
}

.calendar-day.current {
    background: var(--retro-blue);
    color: var(--white);
    box-shadow: 0 8px 24px rgba(26, 54, 93, 0.4);
    animation: pulse 2s infinite;
}

.calendar-day.available {
    background: var(--light-gray);
    color: var(--retro-blue);
    border-color: var(--retro-blue);
}

.calendar-day.available:hover {
    background: var(--retro-blue);
    color: var(--white);
}

.calendar-day.locked {
    background: #e2e8f0;
    color: #94a3b8;
    cursor: not-allowed;
}

.calendar-empty {
    aspect-ratio: 1;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

/* Activity Container */
.activity-container {
    background: var(--white);
    border-radius: 24px;
    padding: 0;
    box-shadow: 0 20px 64px rgba(0, 0, 0, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    overflow: hidden;
}

.activity-header {
    background: var(--retro-blue);
    color: var(--white);
    padding: 48px 64px;
    display: flex;
    align-items: center;
    gap: 32px;
}

.back-btn {
    background: rgba(255, 255, 255, 0.2);
    color: var(--white);
    border: none;
    padding: 16px 24px;
    border-radius: 12px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
}

.back-btn:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: translateX(-4px);
}

.day-info {
    flex: 1;
}

.day-number {
    font-size: 3rem;
    font-weight: 900;
    display: block;
    line-height: 1;
    color: var(--celestial-yellow);
}

.day-date {
    font-size: 1.25rem;
    font-weight: 500;
    opacity: 0.9;
    margin-top: 8px;
}

/* Activity Card */
.activity-card {
    padding: 64px;
}

.activity-header-info h3 {
    font-size: 2.5rem;
    font-weight: 900;
    color: var(--retro-blue);
    margin-bottom: 24px;
    line-height: 1.1;
}

.activity-meta {
    display: flex;
    gap: 16px;
    margin-bottom: 48px;
}

.activity-type, .activity-theme {
    background: var(--light-gray);
    color: var(--medium-gray);
    padding: 12px 20px;
    border-radius: 24px;
    font-size: 0.9rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Activity Sections */
.activity-section {
    margin-bottom: 48px;
}

.activity-section h4 {
    font-size: 1.75rem;
    font-weight: 800;
    color: var(--retro-blue);
    margin-bottom: 24px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.activity-section h4::before {
    content: '';
    width: 6px;
    height: 32px;
    background: var(--neon-flare);
    border-radius: 3px;
}

.activity-section p {
    font-size: 1.1rem;
    line-height: 1.6;
    color: var(--dark-gray);
    margin-bottom: 16px;
}

.highlight {
    background: var(--neon-flare);
    color: var(--white);
    padding: 32px;
    border-radius: 16px;
    font-size: 1.2rem;
    line-height: 1.6;
    font-weight: 500;
    box-shadow: 0 8px 24px rgba(255, 69, 0, 0.2);
}

/* Buttons - Much Bigger and Bolder */
.btn-primary, .btn-secondary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    padding: 20px 40px;
    font-size: 1.2rem;
    font-weight: 700;
    border-radius: 16px;
    border: none;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    text-decoration: none;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    min-width: 200px;
}

.btn-primary {
    background: var(--neon-flare);
    color: var(--white);
    box-shadow: 0 8px 24px rgba(255, 69, 0, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 32px rgba(255, 69, 0, 0.4);
}

.btn-secondary {
    background: var(--retro-blue);
    color: var(--white);
    box-shadow: 0 8px 24px rgba(26, 54, 93, 0.3);
}

.btn-secondary:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 32px rgba(26, 54, 93, 0.4);
}

.btn-secondary:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

/* Activity Actions */
.activity-actions {
    display: flex;
    gap: 24px;
    justify-content: center;
    margin-top: 64px;
    padding-top: 48px;
    border-top: 2px solid var(--light-gray);
}

/* Success Messages */
.success-message {
    background: var(--celestial-yellow);
    color: var(--retro-blue);
    padding: 24px 32px;
    border-radius: 16px;
    font-size: 1.2rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 32px;
    box-shadow: 0 8px 24px rgba(255, 215, 0, 0.3);
    animation: slideIn 0.5s ease-out;
}

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

/* Footer */
.footer {
    background: var(--retro-blue);
    color: var(--white);
    padding: 48px 0;
    text-align: center;
    margin-top: 64px;
}

.footer p {
    font-size: 1.1rem;
    font-weight: 500;
    opacity: 0.9;
}

/* Mobile Responsiveness */
@media (max-width: 768px) {
    .container {
        padding: 0 16px;
    }
    
    .header {
        padding: 24px 0;
    }
    
    .header-content {
        flex-direction: column;
        gap: 24px;
        text-align: center;
    }
    
    .logo h1 {
        font-size: 2.5rem;
    }
    
    .logo p {
        font-size: 1.2rem;
    }
    
    .progress-summary {
        gap: 32px;
    }
    
    .streak-number, .completion-number {
        font-size: 2.5rem;
    }
    
    .welcome-card, .calendar-container, .activity-card {
        padding: 32px;
    }
    
    .welcome-card h2 {
        font-size: 2.5rem;
    }
    
    .calendar-header h2 {
        font-size: 3rem;
    }
    
    .calendar-day {
        font-size: 1.5rem;
    }
    
    .activity-header {
        padding: 32px;
        flex-direction: column;
        text-align: center;
        gap: 24px;
    }
    
    .day-number {
        font-size: 2.5rem;
    }
    
    .activity-header-info h3 {
        font-size: 2rem;
    }
    
    .activity-actions {
        flex-direction: column;
        align-items: center;
    }
    
    .btn-primary, .btn-secondary {
        width: 100%;
        max-width: 300px;
    }
}