/* ============================================================
   contactus-form.css — NexVuel
   Black / white / grey glassmorphism
   ============================================================ */

:root {
    --nv-black:        #0a0a0a;
    --nv-ink:          #111111;
    --nv-ink-2:        #1a1a1a;
    --nv-grey-900:     #1f1f1f;
    --nv-grey-700:     #4a4a4a;
    --nv-grey-500:     #7a7a7a;
    --nv-grey-400:     #9a9a9a;
    --nv-grey-300:     #c8c8c8;
    --nv-grey-200:     #e2e2e2;
    --nv-grey-100:     #efefef;
    --nv-white:        #ffffff;

    --nv-glass-bg:     rgba(255, 255, 255, 0.55);
    --nv-glass-bg-2:   rgba(255, 255, 255, 0.75);
    --nv-glass-border: rgba(255, 255, 255, 0.85);
    --nv-glass-shadow: 0 10px 40px rgba(0, 0, 0, 0.08),
                        0 2px 8px  rgba(0, 0, 0, 0.04);

    --nv-radius:       16px;
    --nv-radius-sm:    10px;

    --nv-focus-ring:   0 0 0 4px rgba(0, 0, 0, 0.08);
    --nv-transition:   all .25s cubic-bezier(.4, 0, .2, 1);
}

/* ------------------------------------------------------------
   Page base — soft monochrome gradient canvas
   ------------------------------------------------------------ */
.nv-contact-page {
    background:
        radial-gradient(1200px 600px at 15% -10%, #f5f5f5 0%, transparent 60%),
        radial-gradient(900px  500px at 90%  10%, #ededed 0%, transparent 55%),
        linear-gradient(180deg, #fafafa 0%, #f2f2f2 100%);
    color: var(--nv-ink);
    min-height: 100vh;
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    -webkit-font-smoothing: antialiased;
}

/* ------------------------------------------------------------
   HERO
   ------------------------------------------------------------ */
.nv-hero {
    position: relative;
    padding: 5rem 1.5rem 3.5rem;
    text-align: center;
    overflow: hidden;
}

.nv-hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(0,0,0,0.035) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0,0,0,0.035) 1px, transparent 1px);
    background-size: 48px 48px;
    mask-image: radial-gradient(ellipse at center, #000 30%, transparent 75%);
    -webkit-mask-image: radial-gradient(ellipse at center, #000 30%, transparent 75%);
    pointer-events: none;
}

.nv-hero-inner {
    position: relative;
    max-width: 720px;
    margin: 0 auto;
}

.nv-eyebrow {
    display: inline-block;
    font-size: .72rem;
    font-weight: 600;
    letter-spacing: .18em;
    text-transform: uppercase;
    color: var(--nv-grey-500);
    padding: .35rem .85rem;
    border: 1px solid var(--nv-grey-200);
    border-radius: 999px;
    background: rgba(255,255,255,.6);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    margin-bottom: 1.25rem;
}

.nv-hero-title {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--nv-black);
    margin: 0 0 .75rem;
    line-height: 1.1;
}

.nv-hero-sub {
    font-size: 1.05rem;
    color: var(--nv-grey-700);
    line-height: 1.65;
    margin: 0;
}

/* ------------------------------------------------------------
   SECTION + WRAP
   ------------------------------------------------------------ */
.nv-section {
    padding: 1rem 1.5rem 6rem;
}

.nv-wrap {
    max-width: 780px;
    margin: 0 auto;
}

/* ------------------------------------------------------------
   GLASS CARD
   ------------------------------------------------------------ */
.nv-glass-card {
    position: relative;
    padding: 2.5rem 2.25rem;
    border-radius: var(--nv-radius);
    background: var(--nv-glass-bg);
    border: 1px solid var(--nv-glass-border);
    box-shadow: var(--nv-glass-shadow);
    backdrop-filter: blur(20px) saturate(140%);
    -webkit-backdrop-filter: blur(20px) saturate(140%);
}

/* Fallback for browsers without backdrop-filter */
@supports not ((backdrop-filter: blur(1px)) or (-webkit-backdrop-filter: blur(1px))) {
    .nv-glass-card { background: var(--nv-glass-bg-2); }
}

.nv-glass-card::before {
    /* subtle inner highlight */
    content: '';
    position: absolute;
    inset: 0;
    border-radius: inherit;
    background: linear-gradient(180deg, rgba(255,255,255,.4), transparent 40%);
    pointer-events: none;
}

.nv-card-head {
    margin-bottom: 2rem;
    position: relative;
}

.nv-card-title {
    font-size: 1.35rem;
    font-weight: 600;
    color: var(--nv-black);
    letter-spacing: -0.01em;
    margin: 0 0 .4rem;
}

.nv-card-sub {
    font-size: .9rem;
    color: var(--nv-grey-500);
    margin: 0;
}

.nv-req { color: var(--nv-black); font-weight: 600; }

/* ------------------------------------------------------------
   GRID + FIELDS
   ------------------------------------------------------------ */
.nv-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.25rem 1.25rem;
}

.nv-field-full { grid-column: 1 / -1; }

.nv-field {
    display: flex;
    flex-direction: column;
    gap: .45rem;
    position: relative;
}

.nv-field label {
    font-size: .72rem;
    font-weight: 600;
    letter-spacing: .08em;
    text-transform: uppercase;
    color: var(--nv-grey-700);
}

.nv-field input,
.nv-field select,
.nv-field textarea {
    width: 100%;
    padding: .8rem 1rem;
    font-family: inherit;
    font-size: .95rem;
    color: var(--nv-ink);
    background: rgba(255,255,255, 0.7);
    border: 1px solid var(--nv-grey-200);
    border-radius: var(--nv-radius-sm);
    transition: var(--nv-transition);
    outline: none;
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
}

.nv-field textarea {
    resize: vertical;
    min-height: 140px;
    line-height: 1.55;
}

.nv-field input::placeholder,
.nv-field textarea::placeholder {
    color: var(--nv-grey-400);
}

.nv-field input:hover,
.nv-field select:hover,
.nv-field textarea:hover {
    border-color: var(--nv-grey-300);
    background: rgba(255,255,255, 0.85);
}

.nv-field input:focus,
.nv-field select:focus,
.nv-field textarea:focus {
    border-color: var(--nv-ink);
    background: var(--nv-white);
    box-shadow: var(--nv-focus-ring);
}

.nv-field input.is-invalid,
.nv-field select.is-invalid,
.nv-field textarea.is-invalid {
    border-color: #b91c1c;
    box-shadow: 0 0 0 4px rgba(185, 28, 28, 0.08);
}

.nv-hint {
    font-size: .75rem;
    color: var(--nv-grey-500);
}

/* ------------------------------------------------------------
   BUTTON
   ------------------------------------------------------------ */
.nv-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: .6rem;
    width: 100%;
    padding: 1rem 1.5rem;
    margin-top: .5rem;
    font-family: inherit;
    font-size: .95rem;
    font-weight: 600;
    letter-spacing: .02em;
    color: var(--nv-white);
    background: var(--nv-black);
    border: 1px solid var(--nv-black);
    border-radius: var(--nv-radius-sm);
    cursor: pointer;
    transition: var(--nv-transition);
}

.nv-btn:hover:not(:disabled) {
    background: var(--nv-ink-2);
    transform: translateY(-1px);
    box-shadow: 0 12px 28px rgba(0, 0, 0, 0.18);
}

.nv-btn:active:not(:disabled) {
    transform: translateY(0);
    box-shadow: 0 6px 14px rgba(0, 0, 0, 0.15);
}

.nv-btn:disabled {
    opacity: .65;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.nv-spinner {
    width: 16px;
    height: 16px;
    border: 2px solid rgba(255,255,255,.35);
    border-top-color: var(--nv-white);
    border-radius: 50%;
    animation: nv-spin .7s linear infinite;
    display: inline-block;
}

@keyframes nv-spin { to { transform: rotate(360deg); } }

/* ------------------------------------------------------------
   ALERTS (status messages)
   ------------------------------------------------------------ */
.nv-alert {
    padding: 1.1rem 1.25rem;
    border-radius: var(--nv-radius-sm);
    margin-bottom: 1.5rem;
    font-size: .9rem;
    line-height: 1.55;
    border: 1px solid;
    background: rgba(255,255,255,.7);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.nv-alert.alert-success {
    border-color: #1f1f1f;
    color: var(--nv-ink);
}

.nv-alert.alert-danger {
    border-color: #b91c1c;
    color: #7f1d1d;
}

.nv-alert .alert-heading {
    font-size: 1rem;
    font-weight: 600;
    margin: 0 0 .25rem;
}

.success-ref-number {
    margin-top: .75rem;
    padding: .6rem .85rem;
    border: 1px dashed var(--nv-grey-300);
    border-radius: 8px;
    font-size: .85rem;
    color: var(--nv-grey-700);
    background: rgba(255,255,255,.55);
}

.success-ref-number span {
    font-family: 'SFMono-Regular', Consolas, monospace;
    font-weight: 600;
    color: var(--nv-black);
    margin-left: .35rem;
}

/* ------------------------------------------------------------
   FADE-IN for alerts
   ------------------------------------------------------------ */
.nv-alert:not(.d-none) {
    animation: nv-fade .35s ease-out;
}

@keyframes nv-fade {
    from { opacity: 0; transform: translateY(-6px); }
    to   { opacity: 1; transform: translateY(0);    }
}

/* ------------------------------------------------------------
   RESPONSIVE
   ------------------------------------------------------------ */
@media (max-width: 720px) {
    .nv-hero        { padding: 3.5rem 1.25rem 2.5rem; }
    .nv-section     { padding: 0 1.25rem 4rem; }
    .nv-glass-card  { padding: 1.75rem 1.25rem; }
    .nv-grid        { grid-template-columns: 1fr; gap: 1rem; }
    .nv-card-title  { font-size: 1.2rem; }
    .nv-btn         { padding: .9rem 1.25rem; }
}