/* ============================================================
   Fillmaster Systems — Changelog Site
   ============================================================ */

:root {
    --fm-navy:        #0d2137;
    --fm-blue:        #1a4a7a;
    --fm-accent:      #0078d4;
    --fm-accent-light:#e8f4fd;
    --fm-teal:        #00b4d8;
    --fm-surface:     #f4f7fb;
    --fm-white:       #ffffff;
    --fm-border:      #dce3ed;
    --fm-text:        #1a2535;
    --fm-text-muted:  #5a6880;
    --fm-radius:      10px;
    --fm-radius-sm:   6px;
    --fm-shadow:      0 2px 12px rgba(13,33,55,.08);
    --fm-shadow-md:   0 4px 24px rgba(13,33,55,.12);

    --badge-bug:         #dc3545;
    --badge-feature:     #0d6efd;
    --badge-enhancement: #0097a7;
    --badge-security:    #6f42c1;
    --badge-performance: #fd7e14;
    --badge-compliance:  #198754;
    --badge-other:       #6c757d;
}

/* ── Base ─────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--fm-surface);
    color: var(--fm-text);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ── Header / Nav ─────────────────────────────────────────── */
.site-header {
    background: linear-gradient(135deg, var(--fm-navy) 0%, var(--fm-blue) 100%);
    box-shadow: 0 2px 16px rgba(0,0,0,.25);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.site-header .navbar {
    padding: .875rem 0;
}

.site-header .navbar-toggler {
    border-color: rgba(255,255,255,.3);
}
.site-header .navbar-toggler-icon {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba%28255%2c 255%2c 255%2c 0.85%29' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
}

.brand-mark {
    display: flex;
    align-items: center;
    gap: .75rem;
    text-decoration: none;
}

.brand-logo {
    height: 38px;
    width: auto;
    flex-shrink: 0;
    filter: brightness(0) invert(1);
    opacity: .92;
}

.brand-text {
    display: flex;
    flex-direction: column;
    line-height: 1.2;
}

.brand-company {
    font-size: .7rem;
    font-weight: 600;
    letter-spacing: .08em;
    text-transform: uppercase;
    color: rgba(255,255,255,.6);
}

.brand-product {
    font-size: 1rem;
    font-weight: 700;
    color: #fff;
}

.site-header .nav-link {
    color: rgba(255,255,255,.75) !important;
    font-size: .875rem;
    transition: color .2s;
}
.site-header .nav-link:hover {
    color: #fff !important;
}

/* ── Main ─────────────────────────────────────────────────── */
.site-main { flex: 1; }

/* ── Footer ───────────────────────────────────────────────── */
.site-footer {
    background: var(--fm-navy);
    color: rgba(255,255,255,.55);
    font-size: .8rem;
    padding: 1.25rem 0;
    margin-top: auto;
}

/* ── Register Page ────────────────────────────────────────── */
.register-page {
    min-height: calc(100vh - 76px - 60px);
    display: flex;
    align-items: center;
    padding: 2.5rem 0;
    background:
        radial-gradient(ellipse at 20% 50%, rgba(0,120,212,.06) 0%, transparent 60%),
        radial-gradient(ellipse at 80% 20%, rgba(0,180,216,.06) 0%, transparent 60%),
        var(--fm-surface);
}

.register-card {
    background: var(--fm-white);
    border-radius: var(--fm-radius);
    box-shadow: var(--fm-shadow-md);
    overflow: hidden;
    border: 1px solid var(--fm-border);
}

.register-header {
    background: linear-gradient(135deg, var(--fm-navy) 0%, var(--fm-blue) 100%);
    padding: 2.5rem 2rem;
    text-align: center;
}

.register-icon {
    width: 64px;
    height: 64px;
    background: rgba(255,255,255,.12);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.75rem;
    color: var(--fm-teal);
    margin: 0 auto 1.25rem;
}

.register-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: #fff;
    margin: 0 0 .5rem;
}

.register-subtitle {
    font-size: .875rem;
    color: rgba(255,255,255,.7);
    margin: 0;
    max-width: 360px;
    margin-inline: auto;
}

.register-body {
    padding: 2rem;
}

.register-footer {
    background: var(--fm-surface);
    border-top: 1px solid var(--fm-border);
    padding: .875rem 2rem;
    text-align: center;
    font-size: .8rem;
    color: var(--fm-text-muted);
}

/* ── Form Elements ────────────────────────────────────────── */
.form-label { font-weight: 500; font-size: .875rem; margin-bottom: .375rem; }
.required-label::after { content: " *"; color: var(--badge-bug); }

.input-group-text {
    background: var(--fm-surface);
    border-color: var(--fm-border);
    color: var(--fm-text-muted);
}

.form-control, .form-select {
    border-color: var(--fm-border);
    font-size: .9rem;
    transition: border-color .2s, box-shadow .2s;
}

.form-control:focus, .form-select:focus {
    border-color: var(--fm-accent);
    box-shadow: 0 0 0 3px rgba(0,120,212,.12);
}

.field-error {
    display: block;
    color: var(--badge-bug);
    font-size: .8rem;
    margin-top: .3rem;
}

.btn-submit {
    background: linear-gradient(135deg, var(--fm-accent) 0%, #0063b3 100%);
    border: none;
    padding: .75rem;
    font-size: .95rem;
    font-weight: 600;
    border-radius: var(--fm-radius-sm);
    transition: opacity .2s, transform .1s;
}
.btn-submit:hover { opacity: .9; transform: translateY(-1px); }
.btn-submit:active { transform: translateY(0); }

.btn-primary {
    background: linear-gradient(135deg, var(--fm-accent) 0%, #0063b3 100%);
    border: none;
}
.btn-primary:hover { background: linear-gradient(135deg, #006dbe 0%, #004e8c 100%); border: none; }

/* reCAPTCHA centering on small screens */
@media (max-width: 360px) {
    .g-recaptcha { transform: scale(.85); transform-origin: 0 0; }
}

/* ── Changelog Hero ───────────────────────────────────────── */
.changelog-hero {
    background: linear-gradient(135deg, var(--fm-navy) 0%, var(--fm-blue) 100%);
    padding: 3rem 0 3.5rem;
    position: relative;
    overflow: hidden;
}

.changelog-hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.02'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    background: rgba(0,180,216,.2);
    color: var(--fm-teal);
    font-size: .75rem;
    font-weight: 600;
    letter-spacing: .06em;
    text-transform: uppercase;
    padding: .35rem .8rem;
    border-radius: 20px;
    margin-bottom: 1rem;
    border: 1px solid rgba(0,180,216,.25);
}

.hero-title {
    font-size: clamp(1.75rem, 4vw, 2.75rem);
    font-weight: 800;
    color: #fff;
    margin: 0 0 .75rem;
    letter-spacing: -.02em;
}

.hero-subtitle {
    font-size: 1rem;
    color: rgba(255,255,255,.7);
    margin: 0 0 1.75rem;
    max-width: 500px;
}

.hero-stats {
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
}

.stat-item {
    display: flex;
    flex-direction: column;
    gap: .15rem;
}

.stat-value {
    font-size: 1.25rem;
    font-weight: 700;
    color: #fff;
}

.stat-label {
    font-size: .72rem;
    font-weight: 500;
    letter-spacing: .05em;
    text-transform: uppercase;
    color: rgba(255,255,255,.5);
}

.hero-illustration {
    width: 180px;
    height: 180px;
    background: rgba(255,255,255,.06);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 5rem;
    color: rgba(0,180,216,.5);
}

/* ── Changelog Container ──────────────────────────────────── */
.changelog-container {
    padding-top: 2rem;
    padding-bottom: 3rem;
}

/* ── Filter Bar ───────────────────────────────────────────── */
.filter-bar {
    border: 1px solid var(--fm-border);
    border-radius: var(--fm-radius);
    box-shadow: var(--fm-shadow);
    margin-bottom: 1.75rem;
    background: var(--fm-white);
}

.filter-label {
    font-size: .78rem;
    font-weight: 600;
    letter-spacing: .04em;
    text-transform: uppercase;
    color: var(--fm-text-muted);
    display: block;
    margin-bottom: .35rem;
}

.filter-input {
    font-size: .875rem;
    border-color: var(--fm-border);
}

.filter-results { min-height: 1.25rem; }

/* ── Release Group Cards ──────────────────────────────────── */
.release-group { margin-bottom: 1.25rem; }

.release-card {
    border: 1px solid var(--fm-border);
    border-radius: var(--fm-radius);
    box-shadow: var(--fm-shadow);
    transition: box-shadow .2s, transform .15s;
    background: var(--fm-white);
    overflow: hidden;
}

.release-card:hover {
    box-shadow: var(--fm-shadow-md);
    transform: translateY(-1px);
}

.release-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: .5rem;
    padding: .9rem 1.5rem;
    background: linear-gradient(135deg, var(--fm-navy) 0%, var(--fm-blue) 100%);
    border-bottom: none;
}

.release-header-left {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: .75rem;
}

.release-version {
    font-family: 'Courier New', Courier, monospace;
    font-size: 1.05rem;
    font-weight: 700;
    color: #fff;
    letter-spacing: .03em;
}

.release-date {
    font-size: .8rem;
    color: rgba(255,255,255,.65);
    display: flex;
    align-items: center;
}

.release-count {
    font-size: .75rem;
    font-weight: 600;
    background: rgba(255,255,255,.15);
    color: rgba(255,255,255,.85);
    padding: .2rem .65rem;
    border-radius: 20px;
    white-space: nowrap;
}

.release-body { padding: 1rem 1.5rem 1.25rem; }

/* ── Change List ──────────────────────────────────────────── */
.change-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.change-item {
    display: flex;
    gap: .6rem;
    padding: .45rem 0;
    border-bottom: 1px solid var(--fm-surface);
    font-size: .9rem;
    line-height: 1.55;
    align-items: baseline;
}

.change-item:last-child { border-bottom: none; }

.change-number {
    font-variant-numeric: tabular-nums;
    font-size: .75rem;
    font-weight: 600;
    color: var(--fm-accent);
    min-width: 1.6rem;
    flex-shrink: 0;
    padding-top: .05rem;
}

.change-text { color: var(--fm-text); }

/* ── Empty State ──────────────────────────────────────────── */
.empty-state {
    text-align: center;
    padding: 5rem 1rem;
    color: var(--fm-text-muted);
}
.empty-state i {
    font-size: 3.5rem;
    display: block;
    margin-bottom: 1rem;
    opacity: .35;
}
.empty-state h3 { font-size: 1.25rem; font-weight: 600; }
.empty-state p  { font-size: .9rem; }

/* ── Error Page ───────────────────────────────────────────── */
.error-page { padding: 2rem; }
.error-icon { font-size: 4rem; color: var(--badge-bug); margin-bottom: 1rem; }

/* ── Animations ───────────────────────────────────────────── */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(12px); }
    to   { opacity: 1; transform: translateY(0); }
}

.release-group {
    animation: fadeInUp .3s ease both;
}

.release-group:nth-child(1)  { animation-delay: .03s; }
.release-group:nth-child(2)  { animation-delay: .06s; }
.release-group:nth-child(3)  { animation-delay: .09s; }
.release-group:nth-child(4)  { animation-delay: .12s; }
.release-group:nth-child(5)  { animation-delay: .15s; }
.release-group:nth-child(n+6){ animation-delay: .18s; }

/* ── Responsive ───────────────────────────────────────────── */
@media (max-width: 575px) {
    .register-header { padding: 2rem 1.25rem; }
    .register-body   { padding: 1.5rem 1.25rem; }
    .register-footer { padding: .75rem 1.25rem; }

    .entry-card .card-body { padding: 1rem; }
    .entry-header { flex-direction: column; align-items: flex-start; }
    .hero-stats { gap: 1rem; }
    .changelog-container { padding-top: 1.25rem; }
}

@media (max-width: 767px) {
    .changelog-hero { padding: 2rem 0 2.5rem; }
}