:root {
    --olive-green: #6b8e23;
    --olive-light: #8fbc8f;
    --nude-pink: #ffd6d6;
    --nude-pink-light: #ffe4e9;
    --background-start: #f5f5dc;
    --background-end: #faf0e6;
    --primary-pink: #ffb3c6;
    --secondary-pink: #ff8fa3;
    --accent-pink: #ffc2d1;
    --flower-star: #ffd6e7;
    --card-bg: #ffffff;
    --text-color: #5d4037;
    --text-color-dark: #3d2914;
    --locked-gray: #e8d5d9;
    --gold: #ffd700;
    --shadow: rgba(107, 142, 35, 0.2);
    --shadow-pink: rgba(255, 179, 198, 0.3);
}

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

body {
    font-family: 'Quicksand', sans-serif;
    background: linear-gradient(135deg, var(--background-start) 0%, var(--background-end) 100%);
    min-height: 100vh;
    color: var(--text-color);
    overflow-x: hidden;
    position: relative;
}

body.valentine-theme {
    background: linear-gradient(135deg, #fef2f4 0%, #ffe4e9 100%);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
    position: relative;
    z-index: 1;
}

.hidden {
    display: none !important;
}

#decorations {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
    overflow: hidden;
}

.flower {
    position: absolute;
    font-size: 20px;
    color: var(--accent-pink);
    opacity: 0.5;
    animation: float 8s ease-in-out infinite;
    pointer-events: none;
}

.star {
    position: absolute;
    font-size: 14px;
    color: var(--flower-star);
    opacity: 0.6;
    animation: twinkle 3s ease-in-out infinite;
    pointer-events: none;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0px) rotate(0deg);
    }
    50% {
        transform: translateY(-20px) rotate(5deg);
    }
}

@keyframes twinkle {
    0%, 100% {
        opacity: 0.4;
        transform: scale(1);
    }
    50% {
        opacity: 0.8;
        transform: scale(1.2);
    }
}

.login-card {
    background: linear-gradient(145deg, var(--card-bg) 0%, #fff9fa 100%);
    border-radius: 20px;
    padding: 3rem 2rem;
    text-align: center;
    box-shadow: 0 10px 40px var(--shadow);
    max-width: 450px;
    margin: 5vh auto;
    border: 2px solid var(--olive-green);
    animation: fadeIn 0.5s ease;
}

.login-title {
    font-size: 4rem;
    margin-bottom: 0.5rem;
}

.login-subtitle {
    font-family: 'Dancing Script', cursive;
    font-size: 2.5rem;
    color: var(--olive-green);
    margin-bottom: 1rem;
}

.login-message {
    font-size: 1.1rem;
    color: var(--text-color);
    margin-bottom: 2rem;
    opacity: 0.8;
}

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

#password-input {
    padding: 1rem;
    border: 2px solid var(--olive-green);
    border-radius: 12px;
    font-size: 1rem;
    font-family: 'Quicksand', sans-serif;
    text-align: center;
    transition: all 0.3s ease;
}

#password-input:focus {
    outline: none;
    border-color: var(--olive-light);
    box-shadow: 0 0 15px var(--shadow);
}

#login-btn {
    padding: 1rem 2rem;
    background: linear-gradient(135deg, var(--olive-green) 0%, var(--olive-light) 100%);
    border: none;
    border-radius: 12px;
    color: white;
    font-size: 1.1rem;
    font-weight: 600;
    font-family: 'Quicksand', sans-serif;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px var(--shadow);
}

#login-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px var(--shadow);
}

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

.error-message {
    color: #d32f2f;
    margin-top: 1rem;
    font-size: 0.95rem;
    min-height: 1.2rem;
    animation: shake 0.5s ease;
}

@keyframes shake {
    0%, 100% {
        transform: translateX(0);
    }
    25% {
        transform: translateX(-10px);
    }
    75% {
        transform: translateX(10px);
    }
}

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

.dashboard-header {
    text-align: center;
    margin-bottom: 3rem;
    animation: fadeIn 0.5s ease;
}

.dashboard-title {
    font-family: 'Dancing Script', cursive;
    font-size: 3.5rem;
    color: var(--olive-green);
    margin-bottom: 0.5rem;
}

.dashboard-subtitle {
    font-size: 1.2rem;
    color: var(--text-color);
    opacity: 0.8;
}

.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.dashboard-card {
    background: linear-gradient(145deg, var(--card-bg) 0%, #fff9fa 100%);
    border-radius: 16px;
    padding: 2rem;
    text-align: center;
    border: 2px solid var(--olive-green);
    box-shadow: 0 4px 15px var(--shadow);
    transition: all 0.3s ease;
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.dashboard-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px var(--shadow);
}

.dashboard-card::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, var(--nude-pink) 0%, transparent 70%);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.dashboard-card:hover::before {
    opacity: 0.1;
}

.card-emoji {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.card-title {
    font-family: 'Dancing Script', cursive;
    font-size: 2rem;
    color: var(--olive-green);
    margin-bottom: 0.5rem;
}

.card-description {
    font-size: 1rem;
    color: var(--text-color);
    opacity: 0.8;
}

.back-btn {
    background: var(--olive-green);
    color: white;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: 8px;
    font-size: 1rem;
    cursor: pointer;
    margin-bottom: 1rem;
    transition: all 0.3s ease;
    font-family: 'Quicksand', sans-serif;
}

.back-btn:hover {
    background: var(--olive-light);
    transform: translateX(-3px);
}

.header {
    text-align: center;
    margin-bottom: 3rem;
    animation: fadeIn 0.5s ease;
}

.main-title {
    font-family: 'Dancing Script', cursive;
    font-size: 3.5rem;
    color: var(--secondary-pink);
    margin-bottom: 0.5rem;
}

.subtitle {
    font-size: 1.5rem;
    color: var(--primary-pink);
    margin-bottom: 0.5rem;
}

.love-note {
    font-size: 1.1rem;
    opacity: 0.8;
}

.days-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-bottom: 3rem;
}

.day-card {
    background: linear-gradient(145deg, var(--card-bg) 0%, #fff9fa 100%);
    border-radius: 16px;
    padding: 2rem 1.5rem;
    text-align: center;
    border: 2px solid var(--primary-pink);
    box-shadow: 0 4px 15px var(--shadow-pink);
    transition: all 0.3s ease;
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.day-card:hover:not(.locked) {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px var(--shadow-pink);
}

.day-card.locked {
    background: linear-gradient(145deg, #f8f8f8 0%, #f0f0f0 100%);
    border-color: var(--locked-gray);
    cursor: not-allowed;
    opacity: 0.7;
}

.day-card.unlocked {
    cursor: pointer;
}

.day-card.unlocked::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, var(--gold) 0%, transparent 70%);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.day-card.unlocked:hover::before {
    opacity: 0.1;
}

.day-emoji {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.day-name {
    font-family: 'Dancing Script', cursive;
    font-size: 1.8rem;
    color: var(--secondary-pink);
    margin-bottom: 0.5rem;
}

.day-date {
    font-size: 0.9rem;
    color: var(--text-color);
    opacity: 0.8;
    margin-bottom: 0.5rem;
}

.day-status {
    font-size: 0.85rem;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    display: inline-block;
    margin-top: 0.5rem;
}

.day-card.locked .day-status {
    background: var(--locked-gray);
    color: #666;
}

.day-card.unlocked .day-status {
    background: var(--primary-pink);
    color: white;
    animation: pulse 2s ease-in-out infinite;
}

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

.overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    animation: fadeInOverlay 0.3s ease;
}

@keyframes fadeInOverlay {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

.overlay-content {
    background: white;
    border-radius: 20px;
    padding: 2rem;
    max-width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    position: relative;
    text-align: center;
    animation: scaleIn 0.3s ease;
    box-shadow: 0 10px 50px rgba(0, 0, 0, 0.3);
}

@keyframes scaleIn {
    from {
        transform: scale(0.8);
        opacity: 0;
    }
    to {
        transform: scale(1);
        opacity: 1;
    }
}

.close-btn {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: var(--primary-pink);
    color: white;
    border: none;
    width: 35px;
    height: 35px;
    border-radius: 50%;
    font-size: 1.2rem;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.close-btn:hover {
    background: var(--secondary-pink);
    transform: rotate(90deg);
}

.overlay-title {
    font-family: 'Dancing Script', cursive;
    font-size: 2.5rem;
    color: var(--secondary-pink);
    margin-bottom: 1.5rem;
    margin-top: 1rem;
}

.overlay-gif {
    margin: 1.5rem 0;
    display: flex;
    justify-content: center;
}

.overlay-gif img {
    max-width: 100%;
    max-height: 50vh;
    border-radius: 12px;
    box-shadow: 0 4px 20px var(--shadow);
}

.overlay-message {
    font-size: 1.2rem;
    color: var(--text-color);
    margin-top: 1rem;
    line-height: 1.6;
}

.footer {
    text-align: center;
    padding: 2rem;
    opacity: 0.8;
}

@media (max-width: 600px) {
    .container {
        padding: 1rem;
    }
    
    .main-title {
        font-size: 2.5rem;
    }
    
    .login-card {
        padding: 2rem 1.5rem;
        margin: 2vh auto;
    }
    
    .days-grid {
        grid-template-columns: 1fr;
    }
    
    .day-card {
        padding: 1.5rem 1rem;
    }
    
    .overlay-content {
        padding: 1.5rem;
    }
    
    .overlay-title {
        font-size: 2rem;
    }
}