/* --- Основные стили и Цветовая схема --- */
:root {
    --dark-navy: #0a192f;
    --navy: #112240;
    --light-navy: #233554;
    --slate: #8892b0;
    --light-slate: #a8b2d1;
    --white: #e6f1ff;
    --accent-color: #8a4fff; /* Фиолетовый акцент */
    --accent-color-light: rgba(138, 79, 255, 0.1);
    --neon-blue: #00e5ff;
}

body {
    background-color: var(--dark-navy);
    background-image: url("data:image/svg+xml,%3Csvg width='40' height='40' viewBox='0 0 40 40' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='%23112240' fill-opacity='0.4' fill-rule='evenodd'%3E%3Cpath d='M0 40L40 0H20L0 20M40 40V20L20 40'/%3E%3C/g%3E%3C/svg%3E");
    color: var(--slate);
    font-family: 'Montserrat', sans-serif;
    font-weight: 400;
    margin: 0;
    padding-top: 120px;
    padding-bottom: 50px;
}

/* --- Шапка сайта --- */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 5%;
    background-color: var(--dark-navy);
    border-bottom: 1px solid var(--light-navy);
    z-index: 100;
    box-sizing: border-box;
}

.logo a {
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 15px;
}

.logo img {
    height: 60px;
    width: auto;
    display: block;
    /* Вырезаем логотип по форме шестиугольника */
    clip-path: polygon(50% 0%, 100% 25%, 100% 75%, 50% 100%, 0% 75%, 0% 25%);
    transition: all 0.3s;
}

.logo img:hover {
    filter: drop-shadow(0 0 8px var(--neon-blue));
    transform: scale(1.1);
}

.logo h1 {
    color: var(--white);
    font-size: 1.8rem;
    margin: 0;
    transition: color 0.3s;
}

.logo a:hover h1 {
    color: var(--accent-color);
}

/* --- Навигация в шапке --- */
.main-nav {
    display: flex;
    gap: 25px;
}

.nav-link {
    color: var(--slate);
    font-size: 1.5rem;
    transition: color 0.3s, transform 0.3s;
}

.nav-link:hover {
    color: var(--accent-color);
    transform: translateY(-2px);
}

.nav-link.active {
    color: var(--accent-color);
}

/* --- Основной контейнер --- */
.container {
    width: 70%;
    max-width: 1200px;
    text-align: center;
    margin: auto;
    padding-top: 40px;
}

/* --- Заголовки --- */
h2, h3 {
    font-weight: 700;
    color: var(--white);
}

/* --- Инструкции и карточки --- */
.instructions, .info-blocks, .controls, #table-wrapper, footer {
    margin-top: 40px;
}

.instructions {
    background-color: var(--navy);
    border-radius: 8px;
    padding: 10px 30px;
    text-align: left;
    border: 1px solid var(--light-navy);
}

.instructions h2 {
    text-align: center;
}

.instructions ol {
    padding-left: 20px;
}

.instructions li {
    margin-bottom: 10px;
}

.info-blocks {
    display: flex;
    justify-content: space-around;
    gap: 30px;
    text-align: left;
}

.info-card {
    background-color: var(--navy);
    flex-basis: 45%;
    padding: 25px;
    border-radius: 8px;
    border: 1px solid var(--accent-color);
    box-shadow: 0 0 15px rgba(138, 79, 255, 0.2);
}

.info-card h3 {
    margin-top: 0;
    border-bottom: 1px solid var(--light-navy);
    padding-bottom: 10px;
}

.info-card p {
    line-height: 1.6;
}

/* --- Кнопки --- */
.controls {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
}

button {
    background-color: transparent;
    color: var(--accent-color);
    border: 1px solid var(--accent-color);
    padding: 12px 24px;
    font-size: 1rem;
    border-radius: 5px;
    cursor: pointer;
    margin: 10px;
    transition: background-color 0.3s, color 0.3s;
    font-family: 'Montserrat', sans-serif;
}

button:hover:not(:disabled) {
    background-color: var(--accent-color-light);
}

button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* --- Контейнер таблицы с анимацией --- */
#table-wrapper {
    overflow: hidden;
    max-height: 2000px;
    transition: max-height 0.7s ease-in-out, margin-top 0.7s ease-in-out;
}

#table-wrapper.hidden {
    max-height: 0;
    margin-top: 0;
}

/* --- Таблица и поля ввода --- */
table {
    width: 100%;
    border-collapse: collapse;
    background-color: var(--navy);
}

th, td {
    border: 1px solid var(--light-navy);
    padding: 15px;
    text-align: left;
}

th {
    color: var(--white);
    background-color: var(--light-navy);
}

tr:nth-child(even) {
    background-color: #1a2c49;
}

input, select, textarea {
    width: 95%;
    background-color: var(--dark-navy);
    border: 1px solid var(--light-navy);
    color: var(--light-slate);
    padding: 8px;
    border-radius: 4px;
    font-family: 'Montserrat', sans-serif;
}

input[type="number"] {
    width: 80px;
}

input[type="time"] {
    background-color: var(--dark-navy);
    border: 1px solid var(--light-navy);
    color: var(--light-slate);
    padding: 8px;
    border-radius: 4px;
    font-family: 'Montserrat', sans-serif;
    color-scheme: dark;
    cursor: pointer;
}

input[type="time"]::-webkit-calendar-picker-indicator {
    filter: invert(0.8);
    cursor: pointer;
}


/* --- Блок калькуляции и результатов --- */
.calculation-controls {
    text-align: right;
    padding: 20px 0;
}

#calculate-btn {
    background-color: var(--accent-color);
    color: var(--dark-navy);
    font-weight: 700;
    border: none;
}
#calculate-btn:hover {
    background-color: var(--white);
    filter: drop-shadow(0 0 8px var(--accent-color));
}

#results-container {
    background-color: var(--navy);
    border: 1px solid var(--accent-color);
    border-radius: 8px;
    padding: 20px;
    margin-top: 20px;
    text-align: center;
    font-size: 1.2rem;
    color: var(--white);
    display: none;
}

/* --- Стили для страницы калькулятора сна --- */
.sleep-calculator {
    background-color: var(--navy);
    padding: 30px;
    border-radius: 8px;
    margin-top: 40px;
    border: 1px solid var(--light-navy);
}
.calculator-form .input-group {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 20px;
    margin: 20px 0;
}
.calculator-form label {
    font-size: 1.2rem;
    color: var(--light-slate);
}
.results {
    margin-top: 30px;
    border-top: 1px solid var(--light-navy);
    padding-top: 20px;
}
.wakeup-option {
    background-color: var(--dark-navy);
    padding: 15px;
    margin: 10px auto;
    border-radius: 5px;
    width: 80%;
    border-left: 4px solid var(--accent-color);
}
.hidden {
    display: none;
}

/* --- Стили для страницы профиля --- */
.profile-form-container {
    background-color: var(--navy);
    padding: 30px;
    border-radius: 8px;
    margin-top: 40px;
    border: 1px solid var(--light-navy);
    text-align: left;
}
.profile-form {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
}
.form-group {
    flex: 1 1 45%;
    display: flex;
    flex-direction: column;
}
.form-group.full-width {
    flex-basis: 100%;
}
.form-group label {
    margin-bottom: 8px;
    color: var(--light-slate);
}
.form-actions {
    flex-basis: 100%;
    display: flex;
    justify-content: flex-end;
    gap: 20px;
    margin-top: 20px;
}
.btn-primary {
    background-color: var(--accent-color);
    color: var(--dark-navy);
    font-weight: 700;
    border: none;
}
.btn-secondary {
    background-color: transparent;
    color: var(--accent-color);
    border: 1px solid var(--accent-color);
}
.profile-preview {
    text-align: left;
}
.preview-content {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
}
.preview-field {
    flex: 1 1 45%;
    background-color: var(--dark-navy);
    padding: 15px;
    border-radius: 5px;
}
.preview-field strong {
    color: var(--light-slate);
}
.preview-field span {
    color: var(--white);
}

/* --- Футер (подвал сайта) --- */
footer {
    width: 100%;
    text-align: center;
    padding: 20px 0;
    font-size: 0.9rem;
    color: var(--light-navy);
}

/* --- Боковые декоративные панели --- */
.left-decoration,
.right-decoration {
    content: '';
    position: fixed;
    top: 0;
    height: 100vh;
    width: 15%;
    max-width: 150px;
    border-color: var(--light-navy);
    border-style: solid;
    border-width: 0;
    z-index: -1;
}

.left-decoration {
    left: 0;
    border-right-width: 1px;
}

.right-decoration {
    right: 0;
    border-left-width: 1px;
}

.left-decoration::before,
.right-decoration::before {
    content: '';
    position: absolute;
    top: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to bottom, 
        var(--navy) 0%, 
        transparent 50%, 
        var(--navy) 100%
    );
    opacity: 0.3;
}
@media (max-width: 768px) {
    .left-decoration, .right-decoration {
        display: none;
    }

    .container {
        width: 95%;
        padding: 10px;
    }

    .site-header {
        flex-direction: column;
        gap: 15px;
        text-align: center;
    }

    .main-nav {
        gap: 20px;
    }

    .info-blocks {
        flex-direction: column;
    }

    #table-container {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }

    table {
        min-width: 600px;
    }

    .preview-field {
        flex: 1 1 100%;
    }

    button, .nav-link {
        padding: 12px 20px;
        font-size: 1rem;
    }
}

@media (max-width: 480px) {
    .logo h1 {
        font-size: 1.2rem;
    }
    
    .main-nav .nav-link {
        font-size: 1.2rem;
    }
}