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

body {
    background: linear-gradient(135deg, #f7f9fc, #e8f6ff);
    color: #2e2e2e;
    min-height: 100vh;
}

header {
    text-align: center;
    padding: 1.5rem 1rem;
    font-size: 2rem;
    font-weight: 600;
    color: #1f6fa3;
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(6px);
    box-shadow: 0 8px 24px rgba(0,0,0,0.08);
}

main {
    max-width: 900px;
    margin: 2.5rem auto;
    padding: 0 1rem;
}

.add-meal {
    background: #ffffff;
    padding: 1.5rem;
    border-radius: 16px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.08);
    margin-bottom: 2.5rem;
}

.add-meal form {
    display: flex;
    flex-wrap: wrap;
    gap: 0.8rem;
}

.add-meal input,
.add-meal select {
    flex: 1;
    padding: 0.65rem 0.9rem;
    font-size: 0.95rem;
    border-radius: 10px;
    border: 1px solid #dcdcdc;
    outline: none;
    background: #fafafa;
    transition: all 0.25s ease;
}

.add-meal input:focus,
.add-meal select:focus {
    border-color: #4da3ff;
    background: #fff;
    box-shadow: 0 0 0 3px rgba(77,163,255,0.2);
}

.add-meal button {
    padding: 0.65rem 1.2rem;
    border-radius: 10px;
    border: none;
    background: linear-gradient(135deg, #4da3ff, #6fd3ff);
    color: #fff;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.add-meal button:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(77,163,255,0.35);
}

.week {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 1.2rem;
}

.day {
    background: #ffffff;
    padding: 0.8rem;
    border-radius: 16px;
    box-shadow: 0 10px 25px rgba(0,0,0,0.07);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.day:hover {
    transform: translateY(-4px);
    box-shadow: 0 14px 35px rgba(0,0,0,0.12);
}

.day h3 {
    text-align: center;
    margin-bottom: 0.6rem;
    font-size: 1rem;
    font-weight: 600;
    color: #4da3ff;
}

.meal-item {
    background: linear-gradient(135deg, #4da3ff, #6fd3ff);
    color: #fff;
    padding: 0.45rem 0.6rem;
    margin-bottom: 0.4rem;
    border-radius: 10px;
    font-size: 0.85rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 0.3rem;

    animation: fadeIn 0.4s ease forwards;
}

.meal-item:hover {
    transform: scale(1.03);
}

.meal-item button {
    background: rgba(255,255,255,0.9);
    color: #4da3ff;
    border: none;
    border-radius: 6px;
    padding: 0.2rem 0.45rem;
    font-size: 0.7rem;
    cursor: pointer;
    transition: all 0.2s ease;
}

.meal-item button:hover {
    background: #fff;
    transform: scale(1.1);
}

.theme-toggle {
    margin-top: 0.8rem;
    padding: 0.4rem 0.9rem;
    border-radius: 20px;
    border: none;
    cursor: pointer;
    font-size: 0.8rem;
    font-weight: 600;
    background: #4da3ff;
    color: white;
    transition: all 0.3s ease;
}

.theme-toggle:hover {
    opacity: 0.85;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(-6px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@media (max-width: 768px) {
    .week {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 480px) {
    .week {
        grid-template-columns: 1fr;
    }
    header {
        font-size: 1.5rem;
    }
}

body.dark {
    background: linear-gradient(135deg, #121826, #1b2336);
    color: #eaeaea;
}

body.dark header {
    background: rgba(20, 25, 40, 0.9);
    color: #9fd3ff;
}

body.dark .add-meal,
body.dark .day {
    background: #1f293b;
    box-shadow: 0 10px 30px rgba(0,0,0,0.6);
}

body.dark .add-meal input,
body.dark .add-meal select {
    background: #111827;
    color: #eaeaea;
    border-color: #374151;
}

body.dark .add-meal input:focus,
body.dark .add-meal select:focus {
    border-color: #60a5fa;
    box-shadow: 0 0 0 3px rgba(96,165,250,0.3);
}

body.dark .meal-item {
    background: linear-gradient(135deg, #60a5fa, #3b82f6);
}

body.dark .meal-item button {
    color: #1e3a8a;
}