:root {
    --primary: #ffffff;
    --primary-hover: #f0f0f0;
    --primary-light: rgba(255, 255, 255, 0.12);
    --primary-dark: #e0e0e0;

    --secondary: #cccccc;
    --secondary-hover: #bbbbbb;
    --secondary-light: rgba(204, 204, 204, 0.12);
    --secondary-dark: #999999;

    --bg-primary: #0a0a0a;
    --bg-secondary: #000000;
    --bg-tertiary: #1a1a1a;
    --bg-card: #111111;
    --bg-hover: #1f1f1f;

    --text-primary: #ffffff;
    --text-secondary: #b0b0b0;
    --text-light: #808080;
    --text-white: #ffffff;

    --border-color: #333333;
    --border-light: #2a2a2a;
    --border-dark: #1a1a1a;

    --shadow-sm: 0 4px 16px rgba(0, 0, 0, 0.5);
    --shadow-md: 0 12px 28px rgba(0, 0, 0, 0.6);
    --shadow-lg: 0 18px 44px rgba(0, 0, 0, 0.7);
    --shadow-xl: 0 24px 64px rgba(0, 0, 0, 0.8);
}

body {
    background: linear-gradient(180deg, #1a1a1a 0%, #000000 100%);
    color: var(--text-primary);
}

header {
    background: rgba(10, 10, 10, 0.95);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(14px);
}

.logo span {
    background: linear-gradient(120deg, #ffffff, #cccccc);
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.nav-links a:not(.btn) {
    color: var(--text-secondary);
}

.nav-links a:not(.btn):hover,
.nav-links a:not(.btn):focus-visible {
    color: var(--text-primary);
}

.nav-links a:not(.btn)::after {
    background: var(--primary);
}

.btn {
    border-radius: 12px;
    border: 1px solid transparent;
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-block;
    text-align: center;
}

.btn-primary {
    background: linear-gradient(135deg, #ffffff, #f0f0f0);
    color: #000000;
    font-weight: 700;
    box-shadow: 0 10px 24px rgba(255, 255, 255, 0.25);
}

.btn-primary:hover {
    background: linear-gradient(135deg, #f5f5f5, #e0e0e0);
    box-shadow: 0 14px 30px rgba(255, 255, 255, 0.35);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.08);
    color: #e0e0e0;
    border-color: rgba(255, 255, 255, 0.2);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.15);
    color: #ffffff !important;
    border-color: rgba(255, 255, 255, 0.4);
}

.btn-danger {
    background: rgba(220, 53, 69, 0.18);
    border-color: rgba(220, 53, 69, 0.34);
    color: #ffb3b3 !important;
}

.btn-danger:hover {
    background: rgba(247, 96, 113, 0.28);
}

.card,
.workspace-sidebar,
.workspace-main,
.history-card,
.editor,
.side-hints,
.feature-card,
.price-card,
.bonus-card,
.cta-block,
.hero-image-wrap {
    background: linear-gradient(160deg, rgba(25, 25, 25, 0.95), rgba(10, 10, 10, 0.95));
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
}

footer {
    background: #000000;
    border-top: 1px solid var(--border-color);
}

.footer-bottom {
    border-top-color: var(--border-color);
}

.footer-links-list a,
.footer-section p {
    color: var(--text-secondary);
}

.footer-links-list a:hover {
    color: var(--primary);
}

.alert {
    border: 1px solid var(--border-color);
    background: var(--bg-card);
    color: var(--text-primary);
}

.auth-shell {
    max-width: 560px;
    margin: 3.5rem auto;
    padding: 0 20px;
}

.auth-card {
    background: linear-gradient(165deg, rgba(20, 20, 20, 0.96), rgba(10, 10, 10, 0.98));
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 2rem;
    box-shadow: var(--shadow-lg);
}

.auth-title {
    font-size: 1.9rem;
    text-align: center;
    margin-bottom: 1.5rem;
}

.auth-footer {
    text-align: center;
    margin-top: 1.6rem;
    padding-top: 1.3rem;
    border-top: 1px solid var(--border-color);
    color: var(--text-secondary);
}

.auth-footer a,
.auth-link {
    color: var(--primary);
    text-decoration: none;
    font-weight: 600;
}

.auth-inline {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.8rem;
}

.form-control,
select,
textarea,
input[type="text"],
input[type="email"],
input[type="password"] {
    background: #0f0f0f;
    border: 1px solid var(--border-color);
    color: var(--text-primary);
}

.form-control::placeholder,
textarea::placeholder {
    color: #707070;
}

.form-control:focus,
select:focus,
textarea:focus,
input:focus {
    border-color: rgba(255, 255, 255, 0.4);
    box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.1);
}

.home-dark,
.hero-section,
.section {
    background: transparent;
}

.hero-badge,
.hero-point,
.price-tag,
.feature-status.ready,
.feature-status.soon {
    border: 1px solid var(--border-color);
}

.hero-badge {
    background: rgba(255, 255, 255, 0.08);
    color: #e0e0e0;
}

.hero-title,
.section-title,
.price-title,
.bonus-title,
.feature-title,
.cta-block h3 {
    color: var(--text-primary);
}

.hero-subtitle,
.section-subtitle,
.feature-text,
.price-list,
.bonus-card p,
.cta-block p {
    color: var(--text-secondary);
}

.cta-block {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.06), rgba(204, 204, 204, 0.04));
}

.balance-line {
    background: linear-gradient(145deg, rgba(30, 30, 30, 0.96), rgba(15, 15, 15, 0.98));
    box-shadow: var(--shadow-md);
}

.tabs {
    background: rgba(255, 255, 255, 0.03);
    box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.03);
}

.tab-btn {
    color: var(--text-secondary);
}

.tab-btn.active {
    background: linear-gradient(135deg, #ffffff, #e8e8e8);
    color: #000000;
    box-shadow: 0 10px 20px rgba(255, 255, 255, 0.15);
}

.workspace-main {
    background: linear-gradient(180deg, rgba(20, 20, 20, 0.94), rgba(10, 10, 10, 0.95));
}

.editor,
.side-hints,
.chat-box,
.assistant-card,
.result-box,
.upload-area,
.history-item,
.quick-link {
    background: rgba(255, 255, 255, 0.02);
    border-color: var(--border-color);
}

.quick-link {
    color: var(--text-primary);
}

.quick-link:hover,
.quick-link:focus-visible {
    background: rgba(255, 255, 255, 0.08);
}

@media (max-width: 960px) {
    .nav-links {
        gap: 1rem;
        flex-wrap: wrap;
        justify-content: flex-end;
    }

    .auth-shell {
        margin-top: 2.4rem;
    }
}

@media (max-width: 640px) {
    .auth-card {
        padding: 1.4rem;
        border-radius: 16px;
    }

    .auth-title {
        font-size: 1.45rem;
    }

    .auth-inline {
        flex-direction: column;
        align-items: flex-start;
    }
}