/* =========================================================
   BUSCADOR DE GRUPOS GII
   Diseño moderno
   ========================================================= */

:root {
    --bg: #f4f7fb;
    --surface: #ffffff;
    --surface-soft: #f8faff;

    --primary: #4055d8;
    --primary-dark: #3044bd;
    --primary-light: #e9edff;

    --text: #182238;
    --text-soft: #5f6d86;
    --text-muted: #8994a8;

    --border: #e2e7f0;

    --success: #16845b;
    --success-bg: #e8f7f0;

    --danger: #c83d4d;
    --danger-bg: #fdecef;

    --warning: #a66a00;
    --warning-bg: #fff5dc;

    --shadow-sm: 0 2px 8px rgba(25, 38, 70, 0.04);
    --shadow: 0 12px 35px rgba(25, 38, 70, 0.07);
    --shadow-hover: 0 18px 45px rgba(25, 38, 70, 0.11);

    --radius: 18px;
    --radius-sm: 12px;

    --container: 1180px;
}


/* =========================================================
   RESET
   ========================================================= */

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    min-height: 100vh;

    background:
        radial-gradient(
            circle at 10% 0%,
            rgba(64, 85, 216, 0.08),
            transparent 32%
        ),
        var(--bg);

    color: var(--text);

    font-family:
        Inter,
        -apple-system,
        BlinkMacSystemFont,
        "Segoe UI",
        Roboto,
        Helvetica,
        Arial,
        sans-serif;

    font-size: 16px;
    line-height: 1.6;
}

a {
    color: inherit;
    text-decoration: none;
}

button,
input,
select,
textarea {
    font: inherit;
}


/* =========================================================
   CONTENEDOR
   ========================================================= */

.container {
    width: min(
        calc(100% - 40px),
        var(--container)
    );

    margin: 0 auto;
}

.container.narrow {
    max-width: 560px;
}


/* =========================================================
   HEADER
   ========================================================= */

.site-header {
    position: sticky;
    top: 0;
    z-index: 100;

    height: 76px;

    background: rgba(255, 255, 255, 0.88);

    border-bottom: 1px solid rgba(226, 231, 240, 0.9);

    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
}

.nav-container {
    height: 76px;

    display: flex;
    align-items: center;
    justify-content: space-between;

    gap: 30px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;

    font-size: 19px;
    font-weight: 800;
    letter-spacing: -0.4px;

    color: var(--text);
}

.logo::before {
    content: "G";

    width: 38px;
    height: 38px;

    display: flex;
    align-items: center;
    justify-content: center;

    border-radius: 11px;

    background: var(--primary);
    color: white;

    font-size: 18px;
    font-weight: 900;

    box-shadow:
        0 7px 18px rgba(64, 85, 216, 0.28);
}

.main-nav {
    display: flex;
    align-items: center;
    gap: 6px;
}

.main-nav a {
    padding: 9px 14px;

    border-radius: 10px;

    color: var(--text-soft);

    font-size: 14px;
    font-weight: 650;

    transition:
        background 0.18s ease,
        color 0.18s ease,
        transform 0.18s ease;
}

.main-nav a:hover {
    background: var(--primary-light);
    color: var(--primary);
}

.main-nav .nav-register {
    margin-left: 5px;

    background: var(--primary);
    color: white;

    padding: 10px 17px;

    box-shadow:
        0 6px 16px rgba(64, 85, 216, 0.2);
}

.main-nav .nav-register:hover {
    background: var(--primary-dark);
    color: white;
    transform: translateY(-1px);
}

.main-nav .nav-logout {
    color: var(--danger);
}

.main-nav .nav-logout:hover {
    background: var(--danger-bg);
    color: var(--danger);
}


/* =========================================================
   MAIN
   ========================================================= */

main {
    min-height: calc(100vh - 150px);
}

.page-header {
    padding: 55px 0 30px;

    display: flex;
    align-items: flex-end;
    justify-content: space-between;

    gap: 30px;
}

.page-header h1 {
    margin: 0 0 7px;

    font-size: clamp(30px, 4vw, 42px);
    line-height: 1.08;
    letter-spacing: -1.4px;
}

.page-header p {
    margin: 0;

    color: var(--text-soft);
}


/* =========================================================
   HERO
   ========================================================= */

.hero {
    padding: 78px 0 65px;
}

.hero-grid {
    display: grid;
    grid-template-columns: 1.15fr 0.85fr;

    gap: 55px;

    align-items: center;
}

.hero-kicker {
    display: inline-flex;
    align-items: center;
    gap: 8px;

    margin-bottom: 18px;

    color: var(--primary);

    font-size: 13px;
    font-weight: 800;

    letter-spacing: 1.4px;
    text-transform: uppercase;
}

.hero-kicker::before {
    content: "";

    width: 28px;
    height: 3px;

    border-radius: 99px;

    background: var(--primary);
}

.hero h1 {
    max-width: 850px;

    margin: 0 0 20px;

    font-size: clamp(42px, 6vw, 72px);
    line-height: 0.98;

    letter-spacing: -3.5px;
}

.hero h1 span {
    color: var(--primary);
}

.hero p {
    max-width: 700px;

    margin: 0;

    color: var(--text-soft);

    font-size: 18px;
    line-height: 1.75;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;

    gap: 12px;

    margin-top: 30px;
}


/* =========================================================
   HERO CARD
   ========================================================= */

.hero-card {
    padding: 32px;

    background: var(--surface);

    border: 1px solid var(--border);
    border-radius: 24px;

    box-shadow: var(--shadow);
}

.hero-card h2 {
    margin: 0 0 18px;

    font-size: 21px;
    letter-spacing: -0.4px;
}

.hero-card ol {
    margin: 0;
    padding-left: 22px;

    color: var(--text-soft);
}

.hero-card li {
    margin: 12px 0;
    padding-left: 4px;
}


/* =========================================================
   BUTTONS
   ========================================================= */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;

    min-height: 44px;

    padding: 10px 18px;

    border: 0;
    border-radius: 11px;

    cursor: pointer;

    font-weight: 750;
    font-size: 14px;

    transition:
        transform 0.18s ease,
        box-shadow 0.18s ease,
        background 0.18s ease;
}

.btn:hover {
    transform: translateY(-1px);
}

.btn-primary {
    background: var(--primary);
    color: white;

    box-shadow:
        0 8px 18px rgba(64, 85, 216, 0.22);
}

.btn-primary:hover {
    background: var(--primary-dark);

    box-shadow:
        0 11px 24px rgba(64, 85, 216, 0.28);
}

.btn-secondary {
    background: var(--primary-light);
    color: var(--primary);
}

.btn-secondary:hover {
    background: #dfe5ff;
}

.btn-full {
    width: 100%;
}


/* =========================================================
   FEATURE CARDS
   ========================================================= */

.features {
    padding: 20px 0 75px;
}

.features-grid {
    display: grid;

    grid-template-columns:
        repeat(3, 1fr);

    gap: 18px;
}

.feature-card {
    padding: 27px;

    background: var(--surface);

    border: 1px solid var(--border);
    border-radius: var(--radius);

    box-shadow: var(--shadow-sm);

    transition:
        transform 0.2s ease,
        box-shadow 0.2s ease;
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-hover);
}

.feature-card h3 {
    margin: 0 0 6px;

    font-size: 17px;
    letter-spacing: -0.3px;
}

.feature-card p {
    margin: 0;

    color: var(--text-soft);
}


/* =========================================================
   CARDS
   ========================================================= */

.card {
    background: var(--surface);

    border: 1px solid var(--border);
    border-radius: var(--radius);

    box-shadow: var(--shadow-sm);
}

.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;

    padding: 24px 26px;

    border-bottom: 1px solid var(--border);
}

.card-header h2 {
    margin: 3px 0 0;

    font-size: 25px;
    letter-spacing: -0.7px;
}

.card-label {
    color: var(--primary);

    font-size: 12px;
    font-weight: 800;

    letter-spacing: 1px;
    text-transform: uppercase;
}


/* =========================================================
   GROUPS
   ========================================================= */

.groups-grid {
    display: grid;

    grid-template-columns:
        repeat(2, minmax(0, 1fr));

    gap: 20px;

    padding-bottom: 70px;
}

.groups-grid .card {
    overflow: hidden;
}

.people-list {
    padding: 8px 18px 18px;
}

.person {
    display: flex;
    align-items: center;

    gap: 14px;

    padding: 14px 8px;

    border-bottom: 1px solid var(--border);
}

.person:last-child {
    border-bottom: 0;
}

.person-avatar {
    flex: 0 0 42px;

    width: 42px;
    height: 42px;

    display: flex;
    align-items: center;
    justify-content: center;

    border-radius: 12px;

    background: var(--primary-light);
    color: var(--primary);

    font-weight: 850;
}

.person-info {
    min-width: 0;

    display: flex;
    flex-direction: column;
}

.person-info > strong {
    font-size: 15px;
}

.person-info > span {
    color: var(--text-muted);

    font-size: 13px;

    overflow: hidden;
    text-overflow: ellipsis;
}

.person-groups {
    display: flex;
    flex-wrap: wrap;

    gap: 7px;

    margin-top: 12px;
}

.person-groups span {
    padding: 5px 9px;

    background: var(--surface-soft);

    border: 1px solid var(--border);
    border-radius: 8px;

    color: var(--text-soft);

    font-size: 12px;
}

.person-groups strong {
    color: var(--text);
}


/* =========================================================
   EMPTY STATES
   ========================================================= */

.empty-state {
    padding: 35px 25px;

    text-align: center;

    color: var(--text-muted);
}

.empty-state p {
    margin: 0;
}


/* =========================================================
   FORMS
   ========================================================= */

.auth-card {
    margin: 65px auto;

    padding: 35px;

    background: var(--surface);

    border: 1px solid var(--border);
    border-radius: 22px;

    box-shadow: var(--shadow);
}

.auth-header {
    margin-bottom: 28px;

    text-align: center;
}

.auth-header h1 {
    margin: 0 0 7px;

    font-size: 32px;
    letter-spacing: -1px;
}

.auth-header p {
    margin: 0;

    color: var(--text-soft);
}

.form {
    display: flex;
    flex-direction: column;

    gap: 20px;
}

.form-group {
    display: flex;
    flex-direction: column;

    gap: 7px;
}

.form-group label {
    color: var(--text);

    font-size: 14px;
    font-weight: 700;
}

.form-group input,
.form-group select,
.form-group textarea,
.search-form input {
    width: 100%;

    padding: 13px 14px;

    background: white;

    border: 1px solid var(--border);
    border-radius: 11px;

    color: var(--text);

    outline: none;

    transition:
        border-color 0.18s ease,
        box-shadow 0.18s ease;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus,
.search-form input:focus {
    border-color: var(--primary);

    box-shadow:
        0 0 0 4px rgba(64, 85, 216, 0.10);
}

.form-help {
    color: var(--text-muted);

    font-size: 12px;
}

.auth-footer {
    margin-top: 24px;

    padding-top: 22px;

    border-top: 1px solid var(--border);

    text-align: center;

    color: var(--text-soft);

    font-size: 14px;
}

.auth-footer a {
    color: var(--primary);
    font-weight: 750;
}


/* =========================================================
   SEARCH
   ========================================================= */

.search-card {
    padding: 25px;

    margin-bottom: 40px;
}

.search-form {
    display: grid;

    grid-template-columns: 1fr auto;

    align-items: end;

    gap: 14px;
}

.search-form .form-group {
    margin: 0;
}

.results-section {
    padding-bottom: 70px;
}

.results-section > h2 {
    margin: 0 0 18px;

    font-size: 22px;
}


/* =========================================================
   ALERTS
   ========================================================= */

.flash-container {
    padding-top: 18px;
}

.alert {
    margin-bottom: 10px;

    padding: 13px 16px;

    border-radius: 11px;

    font-size: 14px;
    font-weight: 600;
}

.alert-success {
    background: var(--success-bg);
    color: var(--success);
}

.alert-error {
    background: var(--danger-bg);
    color: var(--danger);
}

.alert-warning {
    background: var(--warning-bg);
    color: var(--warning);
}

.alert-info {
    background: var(--primary-light);
    color: var(--primary);
}


/* =========================================================
   FOOTER
   ========================================================= */

.site-footer {
    padding: 28px 0;

    border-top: 1px solid var(--border);

    background: rgba(255, 255, 255, 0.55);

    color: var(--text-muted);

    font-size: 13px;

    text-align: center;
}

.site-footer p {
    margin: 0;
}


/* =========================================================
   RESPONSIVE
   ========================================================= */

@media (max-width: 900px) {

    .hero-grid {
        grid-template-columns: 1fr;

        gap: 35px;
    }

    .hero {
        padding-top: 50px;
    }

    .features-grid {
        grid-template-columns: 1fr;
    }

    .groups-grid {
        grid-template-columns: 1fr;
    }

}


@media (max-width: 680px) {

    .container {
        width: min(
            calc(100% - 26px),
            var(--container)
        );
    }

    .site-header,
    .nav-container {
        height: auto;
    }

    .nav-container {
        min-height: 70px;

        flex-direction: column;

        justify-content: center;

        padding: 13px 0;
    }

    .main-nav {
        width: 100%;

        justify-content: center;

        flex-wrap: wrap;
    }

    .main-nav a {
        font-size: 13px;
    }

    .hero {
        padding: 42px 0;
    }

    .hero h1 {
        font-size: 43px;
        letter-spacing: -2.2px;
    }

    .hero p {
        font-size: 16px;
    }

    .hero-card {
        padding: 24px;
    }

    .page-header {
        padding-top: 38px;

        flex-direction: column;
        align-items: flex-start;
    }

    .search-form {
        grid-template-columns: 1fr;
    }

    .auth-card {
        margin: 35px auto;
        padding: 25px 20px;
    }

}