:root {
    color-scheme: light;
    font-size: 16px;
    --bg: #f4f5f7;
    --bg-accent: #e0f2fe;
    --bg-gradient: radial-gradient(circle at 20% -10%, rgba(249, 115, 22, 0.18), transparent 55%), radial-gradient(circle at 90% 0%, rgba(56, 189, 248, 0.18), transparent 45%);
    --surface: #ffffff;
    --card: rgba(255, 255, 255, 0.92);
    --card-strong: #ffffff;
    --text: #0f172a;
    --text-muted: #475467;
    --heading: #111827;
    --accent: #f97316;
    --accent-strong: #ea580c;
    --accent-soft: rgba(249, 115, 22, 0.16);
    --accent-alt: #22c55e;
    --outline: rgba(15, 23, 42, 0.08);
    --outline-strong: rgba(15, 23, 42, 0.16);
    --shadow: 0 28px 60px rgba(15, 23, 42, 0.14);
    --shadow-soft: 0 14px 24px rgba(15, 23, 42, 0.08);
    --input-bg: #f8fafc;
    --badge-bg: rgba(34, 197, 94, 0.14);
    --badge-text: #047857;
}

[data-theme="dark"] {
    color-scheme: dark;
    --bg: #030712;
    --bg-accent: #0f172a;
    --bg-gradient: radial-gradient(circle at 10% -10%, rgba(249, 115, 22, 0.25), transparent 55%), radial-gradient(circle at 90% 5%, rgba(56, 189, 248, 0.22), transparent 50%);
    --surface: #050b15;
    --card: rgba(11, 18, 32, 0.92);
    --card-strong: rgba(15, 23, 42, 0.96);
    --text: #e2e8f0;
    --text-muted: #94a3b8;
    --heading: #f8fafc;
    --accent: #fb923c;
    --accent-strong: #f97316;
    --accent-soft: rgba(249, 115, 22, 0.28);
    --accent-alt: #38f5a6;
    --outline: rgba(148, 163, 184, 0.24);
    --outline-strong: rgba(148, 163, 184, 0.32);
    --shadow: 0 32px 70px rgba(5, 10, 18, 0.65);
    --shadow-soft: 0 18px 32px rgba(5, 10, 18, 0.45);
    --input-bg: rgba(15, 23, 42, 0.65);
    --badge-bg: rgba(56, 189, 248, 0.18);
    --badge-text: #38bdf8;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    min-height: 100vh;
    font-family: "Tajawal", "Cairo", "Segoe UI", sans-serif;
    background-color: var(--bg);
    background-image: linear-gradient(135deg, rgba(15, 23, 42, 0.06) 0%, transparent 35%), var(--bg-gradient);
    color: var(--text);
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 48px 20px;
    position: relative;
    overflow-x: hidden;
    transition: background-color 0.4s ease, color 0.4s ease;
}

body::before {
    content: "";
    position: fixed;
    inset: -40vh 0 auto 0;
    height: 80vh;
    pointer-events: none;
    background: conic-gradient(from 120deg at 50% 50%, rgba(255, 255, 255, 0.14), transparent 55%);
    opacity: 0.5;
    mix-blend-mode: screen;
    z-index: -1;
}

a {
    color: inherit;
}

.page {
    width: min(960px, 100%);
    display: grid;
    gap: 28px;
    position: relative;
}

.page-header {
    display: grid;
    gap: 12px;
    text-align: center;
}

.header-bar {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}

.page-header h1 {
    margin: 0;
    font-size: clamp(2rem, 4vw, 2.6rem);
    font-weight: 800;
    color: var(--heading);
    text-transform: uppercase;
    letter-spacing: 2px;
}

.page-header p {
    margin: 0;
    font-size: 1.05rem;
    color: var(--text-muted);
}

.layout {
    display: grid;
    gap: 24px;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.card,
.login-container,
.update-register-container,
.gateway-card {
    background: var(--card);
    border-radius: 24px;
    padding: 32px;
    border: 1px solid var(--outline);
    box-shadow: var(--shadow);
    position: relative;
    overflow: hidden;
    transition: background 0.4s ease, border-color 0.4s ease, box-shadow 0.4s ease;
}

.card::after,
.login-container::after,
.update-register-container::after,
.gateway-card::after {
    content: "";
    position: absolute;
    inset: 12px;
    border-radius: 20px;
    background: linear-gradient(145deg, transparent 0%, rgba(249, 115, 22, 0.08) 55%, transparent 100%);
    opacity: 0.9;
    pointer-events: none;
    mix-blend-mode: screen;
}

.card > *,
.login-container > *,
.update-register-container > *,
.gateway-card > * {
    position: relative;
    z-index: 1;
}

.card h2,
.login-container h2,
.update-register-container h2,
.gateway-card h2 {
    margin: 0 0 12px;
    font-size: clamp(1.4rem, 2.4vw, 1.8rem);
    color: var(--heading);
    font-weight: 700;
}

.hint {
    margin: 0 0 24px;
    font-size: 0.95rem;
    color: var(--text-muted);
    line-height: 1.7;
}

.badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 14px;
    border-radius: 999px;
    background: var(--badge-bg);
    color: var(--badge-text);
    font-size: 0.88rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.checkbox-group {
    display: grid;
    gap: 16px;
}

.checkbox-option {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 16px 18px;
    border-radius: 16px;
    background: var(--surface);
    border: 1px solid var(--outline);
    transition: border-color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
    cursor: pointer;
}

.checkbox-option:hover {
    transform: translateY(-2px);
    border-color: var(--accent);
    box-shadow: var(--shadow-soft);
}

.checkbox-option:has(input:checked) {
    border-color: var(--accent);
    background: var(--accent-soft);
    box-shadow: 0 16px 32px rgba(249, 115, 22, 0.25);
}

.checkbox-option strong {
    font-size: 1.05rem;
    color: var(--heading);
}

.checkbox-option input {
    accent-color: var(--accent);
    width: 22px;
    height: 22px;
}

.form-grid {
    display: grid;
    gap: 20px;
}

.field-group {
    display: grid;
    gap: 10px;
}

.field-group label,
.field-title {
    font-weight: 700;
    color: var(--heading);
    font-size: 0.96rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

input[type="text"],
input[type="password"],
input[type="tel"],
input[type="date"],
input[type="number"],
select {
    width: 100%;
    border-radius: 14px;
    border: 1px solid var(--outline-strong);
    padding: 14px 16px;
    background: var(--input-bg);
    color: var(--text);
    font-size: 1rem;
    transition: border-color 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

input:focus,
select:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(249, 115, 22, 0.22);
}

.radio-row {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.radio-option {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 10px 18px;
    border-radius: 999px;
    background: var(--surface);
    border: 1px solid var(--outline);
    font-weight: 600;
}

.radio-option input {
    accent-color: var(--accent);
}

.cta-area {
    margin-top: 28px;
    display: grid;
    gap: 14px;
}

.primary-btn,
.secondary-btn,
.login-container button,
.update-register-container button,
.gateway-card button {
    border: none;
    border-radius: 16px;
    padding: 16px 24px;
    font-size: 1rem;
    font-weight: 700;
    cursor: pointer;
    transition: transform 0.2s ease, box-shadow 0.2s ease, opacity 0.2s ease, background 0.2s ease;
}

.primary-btn,
.login-container button,
.update-register-container button,
.gateway-card button {
    background: linear-gradient(135deg, var(--accent), var(--accent-strong));
    color: #fff;
    box-shadow: 0 22px 34px rgba(249, 115, 22, 0.28);
}

.secondary-btn {
    background: var(--surface);
    color: var(--heading);
    border: 1px solid var(--outline);
    box-shadow: var(--shadow-soft);
}

.secondary-btn:hover {
    border-color: var(--accent);
    background: var(--accent-soft);
}

.primary-btn:hover,
.login-container button:hover,
.update-register-container button:hover,
.gateway-card button:hover {
    transform: translateY(-2px);
    box-shadow: 0 26px 38px rgba(249, 115, 22, 0.35);
}

.primary-btn:active,
.secondary-btn:active,
.login-container button:active,
.update-register-container button:active,
.gateway-card button:active {
    transform: translateY(0);
    box-shadow: none;
}

#result {
    color: var(--accent);
    font-weight: 700;
    text-align: center;
    font-size: 1.1rem;
}

#ok {
    color: var(--accent-alt);
    font-weight: 650;
    text-align: center;
    font-size: 1rem;
}

.meta-info {
    font-size: 0.95rem;
    color: var(--text-muted);
    text-align: center;
}

.update-register-container form {
    display: grid;
    gap: 18px;
}

.update-register-actions {
    display: grid;
    gap: 16px;
}

.theme-toggle {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 18px;
    border-radius: 999px;
    border: 1px solid transparent;
    background: var(--surface);
    color: var(--heading);
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    transition: border-color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.theme-toggle:hover {
    border-color: var(--accent);
    transform: translateY(-1px);
    box-shadow: var(--shadow-soft);
}

[data-theme="dark"] .theme-toggle {
    background: rgba(15, 23, 42, 0.6);
    color: var(--text);
}

.single-shell {
    width: min(520px, 100%);
    display: grid;
    gap: 24px;
}

.card-header {
    display: grid;
    gap: 8px;
}

.card-header .header-bar {
    justify-content: space-between;
}

.card-header p {
    margin: 0;
    color: var(--text-muted);
    font-size: 0.95rem;
}

.footer-hint {
    text-align: center;
    color: var(--text-muted);
}

@media (max-width: 768px) {
    body {
        padding: 32px 18px;
    }

    .card,
    .login-container,
    .update-register-container,
    .gateway-card {
        padding: 26px;
    }

    .header-bar {
        flex-direction: column;
        align-items: stretch;
    }

    .theme-toggle {
        align-self: flex-end;
    }
}

@media (max-width: 520px) {
    .layout {
        grid-template-columns: 1fr;
    }

    .card,
    .login-container,
    .update-register-container,
    .gateway-card {
        padding: 24px;
    }

    .page-header h1 {
        font-size: 1.9rem;
    }
}