/* ============================================================
   TowerSocialPulse — Design System
   Dark Purple Theme: violet, purple, pink
   ============================================================ */

/* ---- Variables ---- */
:root {
    --bg-0:         #06040f;
    --bg-1:         #0d0a1e;
    --bg-2:         #140f2a;
    --bg-card:      #1a1329;
    --bg-card-h:    #221a35;

    --border:       #2d1f5e;
    --border-sub:   #1e1540;

    --purple-300:   #c4b5fd;
    --purple-400:   #a78bfa;
    --purple-500:   #8b5cf6;
    --purple-600:   #7c3aed;
    --pink-400:     #f472b6;
    --pink-500:     #ec4899;

    --text-1:       #f1f5f9;
    --text-2:       #cbd5e1;
    --text-3:       #94a3b8;
    --text-4:       #64748b;

    --green-400:    #4ade80;
    --green-500:    #22c55e;
    --red-400:      #f87171;
    --yellow-400:   #facc15;

    --font:         'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --r-sm:         6px;
    --r:            10px;
    --r-lg:         16px;
    --r-xl:         24px;

    --shadow:       0 4px 6px -1px rgba(0,0,0,.5);
    --shadow-lg:    0 20px 40px -10px rgba(0,0,0,.7);
    --glow:         0 0 40px rgba(139,92,246,.15);
    --glow-sm:      0 0 20px rgba(139,92,246,.1);

    --max-w:        1200px;
    --nav-h:        68px;
}

/* ---- Reset ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
    font-family: var(--font);
    background: var(--bg-0);
    color: var(--text-1);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }
a[d-on-click], [d-on-click] { cursor: pointer; }
ul, ol { list-style: none; }

/* ---- Typography ---- */
h1, h2, h3, h4, h5, h6 {
    line-height: 1.2;
    font-weight: 700;
    color: var(--text-1);
}
h1 { font-size: clamp(2.2rem, 5vw, 3.8rem); font-weight: 800; }
h2 { font-size: clamp(1.8rem, 3.5vw, 2.8rem); }
h3 { font-size: 1.25rem; }
p  { color: var(--text-2); }

/* ---- Layout ---- */
.container {
    width: 100%;
    max-width: var(--max-w);
    margin: 0 auto;
    padding: 0 1.5rem;
}
.section { padding: 6rem 0; }
.section--lg { padding: 8rem 0; }

/* ---- Buttons ---- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: .5rem;
    padding: .75rem 1.75rem;
    border-radius: var(--r);
    font-size: .95rem;
    font-weight: 600;
    transition: all .2s ease;
    cursor: pointer;
    white-space: nowrap;
}
.btn--primary {
    background: var(--purple-500);
    color: #fff;
    box-shadow: 0 0 20px rgba(139,92,246,.3);
}
.btn--primary:hover {
    background: var(--purple-600);
    box-shadow: 0 0 30px rgba(139,92,246,.5);
    transform: translateY(-1px);
}
.btn--ghost {
    background: transparent;
    color: var(--text-2);
    border: 1px solid var(--border);
}
.btn--ghost:hover {
    border-color: var(--purple-500);
    color: var(--purple-400);
}
.btn--sm { padding: .5rem 1.25rem; font-size: .875rem; }
.btn--lg { padding: 1rem 2.5rem; font-size: 1.05rem; }
.btn--loading {
    opacity: .65;
    cursor: not-allowed;
    pointer-events: none;
    position: relative;
}
.btn--loading::after {
    content: '';
    display: inline-block;
    width: .9em;
    height: .9em;
    border: 2px solid rgba(255,255,255,.4);
    border-top-color: #fff;
    border-radius: 50%;
    animation: btn-spin .65s linear infinite;
    margin-left: .4rem;
}
@keyframes btn-spin { to { transform: rotate(360deg); } }

/* ---- Badge ---- */
.badge {
    display: inline-flex;
    align-items: center;
    gap: .375rem;
    padding: .35rem .9rem;
    border-radius: 100px;
    font-size: .8rem;
    font-weight: 600;
    letter-spacing: .025em;
    text-transform: uppercase;
}
.badge--purple {
    background: rgba(139,92,246,.12);
    color: var(--purple-400);
    border: 1px solid rgba(139,92,246,.25);
}
/* alias for compat */
.badge--blue {
    background: rgba(139,92,246,.12);
    color: var(--purple-400);
    border: 1px solid rgba(139,92,246,.25);
}
.badge--green {
    background: rgba(34,197,94,.15);
    color: #16a34a;
    border: 1px solid rgba(34,197,94,.3);
    font-size: .72rem;
    padding: .2rem .55rem;
    border-radius: 100px;
    font-weight: 700;
}

/* ---- Navbar ---- */
.navbar {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 1000;
    height: var(--nav-h);
    background: rgba(6,4,15,.9);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-sub);
}
.navbar__inner {
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 2rem;
}
.navbar__brand {
    display: flex;
    align-items: center;
    gap: .6rem;
    font-size: 1.3rem;
    font-weight: 800;
    color: var(--text-1);
    flex-shrink: 0;
}
.navbar__links {
    display: flex;
    align-items: center;
    gap: .25rem;
}
.nav-link {
    padding: .5rem .9rem;
    border-radius: var(--r-sm);
    color: var(--text-3);
    font-size: .9rem;
    font-weight: 500;
    transition: color .15s, background .15s;
}
.nav-link:hover { color: var(--text-1); background: rgba(255,255,255,.05); }
.navbar__actions {
    display: flex;
    align-items: center;
    gap: .75rem;
    flex-shrink: 0;
}
.lang-toggle {
    padding: .4rem .85rem;
    border-radius: var(--r-sm);
    font-size: .8rem;
    font-weight: 600;
    color: var(--text-3);
    border: 1px solid var(--border);
    background: transparent;
    transition: all .15s;
}
.lang-toggle:hover { color: var(--text-1); border-color: var(--purple-500); }
.menu-toggle {
    display: none;
    font-size: 1.4rem;
    color: var(--text-2);
    padding: .25rem;
}
.navbar__mobile {
    display: flex;
    position: fixed;
    inset: 0;
    background: var(--bg-1);
    z-index: 999;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 1.5rem;
    padding: 2rem;
}
.navbar__mobile .nav-link { font-size: 1.25rem; }
.menu-close {
    position: absolute;
    top: 1.5rem; right: 1.5rem;
    font-size: 1.5rem;
    color: var(--text-3);
    background: none;
    border: none;
    cursor: pointer;
}

/* ---- Hero ---- */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
    padding-top: var(--nav-h);
}
.hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse 80% 60% at 50% -10%, rgba(139,92,246,.18) 0%, transparent 65%),
        radial-gradient(ellipse 50% 50% at 80% 70%, rgba(244,114,182,.07) 0%, transparent 60%);
    pointer-events: none;
}
.hero__grid {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(45,31,94,.2) 1px, transparent 1px),
        linear-gradient(90deg, rgba(45,31,94,.2) 1px, transparent 1px);
    background-size: 60px 60px;
    pointer-events: none;
    mask-image: radial-gradient(ellipse 80% 80% at 50% 20%, black 30%, transparent 70%);
}
.hero__inner {
    position: relative;
    z-index: 1;
    text-align: center;
    padding: 6rem 0 4rem;
}
.hero__eyebrow { margin-bottom: 1.5rem; }
.hero__title {
    margin-bottom: 1.5rem;
    letter-spacing: -.02em;
}
.hero__title span {
    background: linear-gradient(135deg, var(--purple-400), var(--pink-400));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.hero__subtitle {
    font-size: clamp(1rem, 2vw, 1.2rem);
    color: var(--text-3);
    max-width: 600px;
    margin: 0 auto 2.5rem;
}
.hero__cta {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 3rem;
}
.hero__trust {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: .75rem;
    font-size: .85rem;
    color: var(--text-4);
}
.hero__trust-dot {
    width: 4px; height: 4px;
    border-radius: 50%;
    background: var(--text-4);
}

/* ---- Section headers ---- */
.section-header { text-align: center; margin-bottom: 4rem; }
.section-header h2 { margin-bottom: 1rem; }
.section-header p {
    font-size: 1.1rem;
    color: var(--text-3);
    max-width: 560px;
    margin: 0 auto;
}

/* ---- How it works ---- */
.how-it-works { background: var(--bg-1); }
.steps {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    position: relative;
}
.steps::before {
    content: '';
    position: absolute;
    top: 3.5rem; left: calc(33.333% - .5rem); right: calc(33.333% - .5rem);
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--border), transparent);
}
.step {
    background: var(--bg-card);
    border: 1px solid var(--border-sub);
    border-radius: var(--r-lg);
    padding: 2.5rem 2rem;
    text-align: center;
    position: relative;
    transition: transform .2s, box-shadow .2s;
}
.step:hover { transform: translateY(-4px); box-shadow: var(--glow); }
.step__icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    display: block;
}
.step__num {
    position: absolute;
    top: -1px; left: 50%;
    transform: translate(-50%, -50%);
    width: 2rem; height: 2rem;
    border-radius: 50%;
    background: var(--purple-500);
    color: #fff;
    font-size: .75rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 3px solid var(--bg-1);
}
.step h3 { margin-bottom: .75rem; }

/* ---- Features ---- */
.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}
.feature-card {
    background: var(--bg-card);
    border: 1px solid var(--border-sub);
    border-radius: var(--r-lg);
    padding: 2rem;
    transition: transform .2s, border-color .2s, box-shadow .2s;
}
.feature-card:hover {
    transform: translateY(-3px);
    border-color: var(--border);
    box-shadow: var(--glow-sm);
}
.feature-card__icon {
    font-size: 2rem;
    margin-bottom: 1rem;
}
.feature-card h3 { margin-bottom: .6rem; font-size: 1.05rem; }
.feature-card p { font-size: .9rem; color: var(--text-3); }

/* ---- Platforms ---- */
.platforms-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}
.platform-card {
    background: var(--bg-card);
    border: 1px solid var(--border-sub);
    border-radius: var(--r-lg);
    padding: 1.75rem 1.5rem;
    text-align: center;
    transition: transform .2s, border-color .2s, box-shadow .2s;
}
.platform-card:hover {
    transform: translateY(-3px);
    border-color: var(--border);
    box-shadow: var(--glow-sm);
}
.platform-card__icon { font-size: 2.5rem; margin-bottom: .75rem; }
.platform-card__name { font-size: 1rem; font-weight: 600; color: var(--text-1); margin-bottom: .4rem; }
.platform-card__status { font-size: .75rem; color: var(--text-4); }
.platform-card__badge {
    display: inline-block;
    font-size: .7rem;
    font-weight: 700;
    padding: .15rem .5rem;
    border-radius: 100px;
    background: rgba(74,222,128,.1);
    color: var(--green-400);
    border: 1px solid rgba(74,222,128,.2);
    margin-top: .25rem;
}

/* ---- Pricing ---- */
.pricing-bg { background: var(--bg-1); }
.pricing-toggles {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    margin-bottom: 3rem;
}
.pricing-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: .75rem;
}
.pricing-toggle__label { font-size: .9rem; color: var(--text-3); font-weight: 500; }
.toggle-switch {
    display: flex;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 100px;
    padding: 3px;
    gap: 3px;
}
.toggle-switch button {
    padding: .4rem 1rem;
    border-radius: 100px;
    font-size: .85rem;
    font-weight: 600;
    color: var(--text-4);
    transition: all .2s;
}
.toggle-switch button.active {
    background: var(--purple-500);
    color: #fff;
}
.pricing-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
    align-items: start;
}
.pricing-card {
    background: var(--bg-card);
    border: 1px solid var(--border-sub);
    border-radius: var(--r-xl);
    padding: 2.5rem 2rem;
    transition: transform .2s, box-shadow .2s;
}
.pricing-card--featured {
    border-color: var(--purple-500);
    box-shadow: var(--glow);
    position: relative;
    transform: scale(1.03);
}
.pricing-card--featured:hover { transform: scale(1.03) translateY(-4px); }
.pricing-card:not(.pricing-card--featured):hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}
.pricing-card__label {
    position: absolute;
    top: -1px; left: 50%;
    transform: translate(-50%, -50%);
    padding: .3rem 1rem;
    background: var(--purple-500);
    color: #fff;
    font-size: .75rem;
    font-weight: 700;
    border-radius: 100px;
    text-transform: uppercase;
    letter-spacing: .05em;
    white-space: nowrap;
}
.pricing-card__tier { font-size: .85rem; font-weight: 600; color: var(--text-4); text-transform: uppercase; letter-spacing: .08em; margin-bottom: .75rem; }
.pricing-card__price { margin-bottom: 1.75rem; }
.pricing-card__price .amount { font-size: 3rem; font-weight: 800; color: var(--text-1); line-height: 1; }
.pricing-card__price .period { font-size: .9rem; color: var(--text-4); margin-top: .25rem; }
.pricing-card__features { list-style: none; margin-bottom: 2rem; }
.pricing-card__features li {
    display: flex;
    align-items: flex-start;
    gap: .6rem;
    padding: .55rem 0;
    font-size: .9rem;
    color: var(--text-2);
    border-bottom: 1px solid var(--border-sub);
}
.pricing-card__features li:last-child { border-bottom: none; }
.pricing-card__features li::before { content: '✓'; color: var(--green-400); font-weight: 700; flex-shrink: 0; }
.pricing-card__features li.off { color: var(--text-4); }
.pricing-card__features li.off::before { content: '—'; color: var(--text-4); }
.pricing-card .btn { width: 100%; justify-content: center; }

/* ---- CTA / Waitlist ---- */
.cta-section {
    background:
        radial-gradient(ellipse 80% 80% at 50% 50%, rgba(139,92,246,.08) 0%, transparent 70%),
        var(--bg-1);
    border-top: 1px solid var(--border-sub);
    border-bottom: 1px solid var(--border-sub);
}
.cta-box { text-align: center; max-width: 600px; margin: 0 auto; }
.cta-box h2 { margin-bottom: 1rem; }
.cta-box p { color: var(--text-3); margin-bottom: 2.5rem; font-size: 1.05rem; }
.waitlist-form {
    display: flex;
    gap: .75rem;
    max-width: 480px;
    margin: 0 auto;
}
.waitlist-form input {
    flex: 1;
    padding: .85rem 1.25rem;
    border-radius: var(--r);
    background: var(--bg-card);
    border: 1px solid var(--border);
    color: var(--text-1);
    font-size: .95rem;
    font-family: var(--font);
    transition: border-color .2s;
    outline: none;
}
.waitlist-form input::placeholder { color: var(--text-4); }
.waitlist-form input:focus { border-color: var(--purple-500); box-shadow: 0 0 0 3px rgba(139,92,246,.15); }
.waitlist-success {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: .75rem;
    padding: 1rem 1.5rem;
    background: rgba(74,222,128,.08);
    border: 1px solid rgba(74,222,128,.2);
    border-radius: var(--r);
    color: var(--green-400);
    font-weight: 500;
    max-width: 480px;
    margin: 0 auto;
}
.waitlist-error {
    margin-top: .75rem;
    color: var(--red-400);
    font-size: .875rem;
    text-align: center;
}

/* ---- Signup plan selector cards ---- */
.plan-select-card {
    position: relative;
    padding: .875rem 1rem;
    border: 2px solid var(--border);
    border-radius: var(--r);
    cursor: pointer;
    transition: border-color .15s, background .15s;
    background: var(--bg-2);
}
.plan-select-card:hover { border-color: var(--purple-500); }
.plan-select-card--active { border-color: var(--purple-500); background: rgba(139,92,246,.05); }
.plan-select-card--pro { border-color: rgba(139,92,246,.35); }
.plan-select-card--pro:hover { border-color: var(--purple-500); }
.plan-select-card--pro.plan-select-card--active { border-color: var(--purple-500); }

/* Prominent signup error */
.signup-error {
    margin-top: 1rem;
    padding: .75rem 1rem;
    background: rgba(248,113,113,.08);
    border: 1px solid rgba(248,113,113,.3);
    border-radius: var(--r);
    color: var(--red-400);
    font-size: .9rem;
    font-weight: 500;
}

/* ---- Auth pages ---- */
.auth-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding-top: var(--nav-h);
    padding-bottom: 4rem;
}
.auth-card {
    width: 100%;
    max-width: 420px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--r-xl);
    padding: 3rem 2.5rem;
    box-shadow: var(--shadow-lg);
}
.auth-card__logo {
    text-align: center;
    margin-bottom: 2rem;
}
.auth-card__logo .brand { font-size: 1.5rem; font-weight: 800; }
.auth-card h2 { text-align: center; margin-bottom: .5rem; font-size: 1.5rem; }
.auth-card__sub { text-align: center; color: var(--text-3); font-size: .9rem; margin-bottom: 2rem; }
.form-group { margin-bottom: 1.25rem; }
.form-group label { display: block; font-size: .875rem; font-weight: 500; color: var(--text-2); margin-bottom: .5rem; }
.form-group input {
    width: 100%;
    padding: .75rem 1rem;
    border-radius: var(--r);
    background: var(--bg-2);
    border: 1px solid var(--border);
    color: var(--text-1);
    font-size: .95rem;
    font-family: var(--font);
    outline: none;
    transition: border-color .2s, box-shadow .2s;
}
.form-group input:focus { border-color: var(--purple-500); box-shadow: 0 0 0 3px rgba(139,92,246,.15); }
.form-group input::placeholder { color: var(--text-4); }
.auth-footer {
    text-align: center;
    margin-top: 1.5rem;
    font-size: .875rem;
    color: var(--text-4);
}
.auth-footer a { color: var(--purple-400); }
.auth-footer a:hover { color: var(--purple-300); }
.auth-notice {
    background: rgba(139,92,246,.08);
    border: 1px solid rgba(139,92,246,.2);
    border-radius: var(--r);
    padding: .9rem 1rem;
    font-size: .875rem;
    color: var(--purple-300);
    margin-bottom: 1.5rem;
    text-align: center;
}

/* ---- Footer ---- */
.footer {
    background: var(--bg-1);
    border-top: 1px solid var(--border-sub);
    padding: 4rem 0 2rem;
}
.footer__inner {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 3rem;
    margin-bottom: 3rem;
}
.footer__brand .brand-name { font-size: 1.2rem; font-weight: 800; color: var(--text-1); margin-bottom: .75rem; }
.footer__brand p { font-size: .9rem; color: var(--text-4); max-width: 240px; line-height: 1.7; }
.footer__col h4 { font-size: .85rem; font-weight: 600; text-transform: uppercase; letter-spacing: .08em; color: var(--text-3); margin-bottom: 1rem; }
.footer__col a {
    display: block;
    font-size: .9rem;
    color: var(--text-4);
    padding: .3rem 0;
    transition: color .15s;
}
.footer__col a:hover { color: var(--text-2); }
.footer__bottom {
    border-top: 1px solid var(--border-sub);
    padding-top: 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 1rem;
}
.footer__copy { font-size: .85rem; color: var(--text-4); }
.footer__markets { font-size: .85rem; color: var(--text-4); }

/* ---- Admin ---- */
.admin-header { background: var(--bg-card); border-bottom: 1px solid var(--border); }
.admin-tabs { display: flex; gap: .5rem; margin-bottom: 1.5rem; border-bottom: 1px solid var(--border); padding-bottom: .5rem; }
.admin-tab { padding: .5rem 1.25rem; border-radius: var(--r-sm); font-size: .9rem; font-weight: 600; color: var(--text-3); cursor: pointer; }
.admin-tab--active { background: var(--purple-500); color: #fff; }
.admin-table { width: 100%; border-collapse: collapse; font-size: .9rem; }
.admin-table th { text-align: left; padding: .75rem 1rem; color: var(--text-3); font-size: .8rem; text-transform: uppercase; letter-spacing: .05em; border-bottom: 1px solid var(--border); }
.admin-table td { padding: .75rem 1rem; border-bottom: 1px solid var(--border); color: var(--text-2); word-break: break-word; max-width: 300px; }
.admin-table tr:hover td { background: var(--bg-card); }

/* ---- Dashboard common ---- */
.dash-page { padding: calc(var(--nav-h) + 2rem) 0 4rem; min-height: 100vh; }
.dash-card { background: var(--bg-card); border: 1px solid var(--border-sub); border-radius: var(--r-lg); padding: 1.5rem; }
.status-badge { display: inline-block; padding: .2rem .6rem; border-radius: 100px; font-size: .75rem; font-weight: 700; text-transform: uppercase; letter-spacing: .04em; }
.status-active   { background: rgba(74,222,128,.1);  color: var(--green-400);  border: 1px solid rgba(74,222,128,.2); }
.status-pending  { background: rgba(250,204,21,.1);  color: var(--yellow-400); border: 1px solid rgba(250,204,21,.2); }
.status-failed   { background: rgba(248,113,113,.1); color: var(--red-400);    border: 1px solid rgba(248,113,113,.2); }

/* ---- Responsive ---- */
@media (max-width: 1024px) {
    .features-grid { grid-template-columns: repeat(2, 1fr); }
    .platforms-grid { grid-template-columns: repeat(2, 1fr); }
    .footer__inner { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
    .navbar__links { display: none; }
    .menu-toggle { display: flex; }
    .steps { grid-template-columns: 1fr; }
    .steps::before { display: none; }
    .features-grid { grid-template-columns: 1fr; }
    .platforms-grid { grid-template-columns: repeat(2, 1fr); }
    .pricing-grid { grid-template-columns: 1fr; }
    .pricing-card--featured { transform: none; }
    .waitlist-form { flex-direction: column; }
    .footer__inner { grid-template-columns: 1fr; gap: 2rem; }
    .footer__bottom { flex-direction: column; text-align: center; }
}
@media (max-width: 480px) {
    .hero__cta { flex-direction: column; align-items: center; }
    .auth-card { padding: 2rem 1.5rem; }
    .platforms-grid { grid-template-columns: 1fr; }
}