:root {
    --primary: #14b8ad;
    --primary-dark: #0e8e88;
    --primary-light: #74ddd5;
    --primary-soft: #dff7f5;

    --secondary: #334e57;
    --secondary-soft: #5d747b;

    --accent-coral: #e98a68;
    --accent-coral-dark: #d87554;
    --accent-coral-soft: #fbe4dc;

    --accent-purple: #8b6bb7;
    --accent-purple-dark: #7656a0;
    --accent-purple-soft: #eee8f6;

    --background: #f4f8f8;
    --background-soft: #eaf5f4;
    --white: #ffffff;

    --card: rgba(255, 255, 255, 0.93);
    --text: #35505a;
    --muted: #71858b;

    --border: rgba(14, 142, 136, 0.15);
    --shadow: rgba(37, 82, 88, 0.12);

    --error: #c75f58;
    --error-soft: #fbe8e6;
    --success: #478267;
    --success-soft: #e6f4ec;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    min-height: 100vh;
    font-family: Arial, Helvetica, sans-serif;
    color: var(--text);
    background-color: var(--background);
}

.header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 18px 42px;
    background-color: var(--primary);
    box-shadow: 0 6px 20px rgba(20, 184, 173, 0.18);
}

.header a {
    padding: 12px 17px;
    color: var(--white);
    text-align: center;
    text-decoration: none;
    font-size: 17px;
    border-radius: 12px;
    transition:
        background-color 0.25s ease,
        color 0.25s ease,
        transform 0.25s ease,
        box-shadow 0.25s ease;
}

.header a.logo {
    padding: 6px 0;
    font-size: 29px;
    font-weight: 800;
    letter-spacing: 1.5px;
    text-shadow: 0 2px 5px rgba(0, 0, 0, 0.12);
}

.header-right {
    display: flex;
    align-items: center;
    gap: 8px;
}

.header-right a:hover {
    background-color: rgba(255, 255, 255, 0.18);
    transform: translateY(-2px);
}

.header a.active-link {
    background-color: rgba(255, 255, 255, 0.96);
    color: var(--primary-dark);
    font-weight: bold;
    box-shadow: 0 4px 12px rgba(16, 93, 95, 0.14);
}

.header a.active-link:hover {
    background-color: var(--white);
    color: var(--secondary);
}

.page-wrapper {
    position: relative;
    min-height: calc(100vh - 82px);
    overflow: hidden;
}

.centered-page {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 48px 20px;
}

.decorative-shape {
    position: absolute;
    border-radius: 50%;
    opacity: 0.58;
    pointer-events: none;
}

.shape-left {
    top: 90px;
    left: -90px;
    width: 220px;
    height: 220px;
    background-color: var(--primary-soft);
}

.shape-right {
    top: 210px;
    right: -75px;
    width: 185px;
    height: 185px;
    background-color: var(--accent-purple-soft);
}

.shape-bottom {
    right: 22%;
    bottom: 34px;
    width: 112px;
    height: 112px;
    background-color: var(--accent-coral-soft);
}

.main-container {
    position: relative;
    z-index: 1;
    width: min(1060px, calc(100% - 48px));
    margin: 0 auto;
    padding: 68px 0 58px;
}

.hero-container {
    display: flex;
    justify-content: center;
    padding-top: 82px;
}

.page-heading {
    margin-bottom: 30px;
}

.badge {
    display: inline-block;
    margin-bottom: 15px;
    padding: 8px 15px;
    border-radius: 30px;
    background-color: var(--primary-soft);
    color: var(--primary-dark);
    font-size: 13px;
    font-weight: bold;
    letter-spacing: 0.6px;
    text-transform: uppercase;
}

h1 {
    margin: 0;
    color: var(--secondary);
    font-size: clamp(36px, 5vw, 58px);
    line-height: 1.08;
}

.highlight {
    color: var(--primary-dark);
}

.page-description {
    max-width: 720px;
    margin: 17px 0 0;
    color: var(--muted);
    font-size: 17px;
    line-height: 1.7;
}

h2 {
    margin: 0;
    color: var(--secondary);
    font-size: 22px;
}

.card-description {
    margin: 10px 0 20px;
    color: var(--muted);
    font-size: 15px;
    line-height: 1.65;
}

.content-card {
    padding: 26px;
    border: 1px solid rgba(255, 255, 255, 0.92);
    border-radius: 24px;
    background-color: var(--card);
    box-shadow:
        0 15px 35px var(--shadow),
        0 2px 4px rgba(0, 0, 0, 0.03);
}

.card-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    margin-bottom: 17px;
    border-radius: 16px;
    color: var(--white);
    font-size: 22px;
    font-weight: bold;
    background-color: var(--primary-dark);
    box-shadow: 0 7px 16px rgba(51, 78, 87, 0.14);
}

button {
    padding: 12px 17px;
    border: none;
    border-radius: 12px;
    color: var(--white);
    cursor: pointer;
    font-size: 14px;
    font-weight: bold;
    box-shadow: 0 6px 14px rgba(51, 78, 87, 0.14);
    transition:
        transform 0.25s ease,
        box-shadow 0.25s ease,
        filter 0.25s ease,
        background-color 0.25s ease;
}

button:hover:not(:disabled) {
    transform: translateY(-3px);
    box-shadow: 0 10px 18px rgba(51, 78, 87, 0.2);
    filter: brightness(1.05);
}

button:disabled {
    cursor: not-allowed;
    opacity: 0.48;
    box-shadow: none;
}

.primary-button {
    background-color: var(--primary-dark);
}

.coral-button {
    background-color: var(--accent-coral);
}

.purple-button {
    background-color: var(--accent-purple);
}

.secondary-button {
    background-color: var(--secondary);
}

.play-button {
    background-color: #0e8e88;
    color: white;
}

.hidden {
    display: none;
}

.form-group {
    margin-top: 15px;
}

label {
    display: block;
    margin-bottom: 7px;
    color: var(--primary-dark);
    font-size: 13px;
    font-weight: bold;
    letter-spacing: 0.2px;
}

input {
    width: 100%;
    padding: 12px 13px;
    border: 1px solid rgba(14, 142, 136, 0.2);
    border-radius: 11px;
    background-color: #fbfdfd;
    color: var(--text);
    font-size: 15px;
    outline: none;
    transition:
        border-color 0.2s ease,
        box-shadow 0.2s ease,
        background-color 0.2s ease;
}

input::placeholder {
    color: #a1afb3;
}

input:focus {
    border-color: var(--primary);
    background-color: var(--white);
    box-shadow: 0 0 0 4px rgba(20, 184, 173, 0.12);
}

.message {
    display: none;
    margin-top: 15px;
    padding: 11px 12px;
    border-radius: 10px;
    font-size: 14px;
    font-weight: bold;
    line-height: 1.45;
    word-break: break-word;
}

.message.error {
    display: block;
    border: 1px solid rgba(199, 95, 88, 0.2);
    background-color: var(--error-soft);
    color: var(--error);
}

.message.success {
    display: block;
    border: 1px solid rgba(71, 130, 103, 0.2);
    background-color: var(--success-soft);
    color: var(--success);
}

.status-message {
    display: none;
    margin: 16px 0 0;
    padding: 12px 14px;
    border: 1px solid rgba(20, 184, 173, 0.18);
    border-radius: 11px;
    background-color: var(--primary-soft);
    color: var(--secondary);
    font-size: 14px;
    font-weight: bold;
    line-height: 1.5;
    white-space: pre-line;
}

@media screen and (max-width: 700px) {
    .header {
        padding: 16px 18px;
    }

    .header a {
        padding: 10px 11px;
        font-size: 15px;
    }

    .header a.logo {
        font-size: 24px;
    }

    .main-container {
        width: calc(100% - 32px);
        padding: 46px 0 38px;
    }

    .shape-left {
        left: -140px;
    }

    .shape-right {
        right: -125px;
    }
}