/* ============================================================
   TechnoBoost Contact v1.0.0 — Architectural Precision
   Design System: Stitch / "The Digital Architect"
   ============================================================ */

/* --- Design Tokens --- */
:root {
    --tb-primary:                 #006571;
    --tb-primary-dim:             #005863;
    --tb-primary-container:       #00e3fd;
    --tb-surface:                 #f5f7f9;
    --tb-on-surface:              #2c2f31;
    --tb-surface-container-low:   #eef1f3;
    --tb-surface-container-lowest:#ffffff;
    --tb-surface-container-high:  #dfe3e6;
    --tb-outline-variant:         #abadaf;
    --tb-on-surface-variant:      #595c5e;
    --tb-on-primary:              #d8f8ff;
    --tb-on-primary-fixed:        #003840;
    --tb-inverse-surface:         #0b0f10;

    --tb-font-headline: 'Space Grotesk', sans-serif;
    --tb-font-body:     'Inter', sans-serif;

    --tb-shadow-ambient: 0 20px 40px -5px rgba(44,47,49,0.04);
    --tb-ghost-border:   1px solid rgba(171,173,175,0.15);
    --tb-radius-md:      0.375rem;
    --tb-radius-lg:      0.75rem;
    --tb-radius-xl:      1rem;
}

/* --- Base --- */
.tb-contact {
    font-family: var(--tb-font-body);
    color: var(--tb-on-surface);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.tb-contact *,
.tb-contact *::before,
.tb-contact *::after {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

/* --- Ghost Border --- */
.ghost-border {
    border: var(--tb-ghost-border);
}

/* --- Glass Panel --- */
.glass-panel {
    background: rgba(255,255,255,0.7);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: var(--tb-ghost-border);
}

/* --- Form Input Styles --- */
.tb-input {
    font-family: var(--tb-font-body);
    transition: border-color 0.2s ease;
}

.tb-input:focus {
    border-bottom-color: var(--tb-primary-container) !important;
    border-bottom-width: 2px;
}

.tb-input::placeholder {
    color: rgba(171,173,175,0.4);
}

/* datetime-local styling */
input[type="datetime-local"].tb-input {
    color-scheme: light;
}

/* --- Scroll Animations --- */
.tb-fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.tb-fade-in.tb-visible {
    opacity: 1;
    transform: translateY(0);
}

/* --- Mobile Hamburger Animation --- */
#tb-mobile-toggle.active .tb-burger-line:nth-child(1) {
    transform: translateY(6px) rotate(45deg);
}
#tb-mobile-toggle.active .tb-burger-line:nth-child(2) {
    opacity: 0;
}
#tb-mobile-toggle.active .tb-burger-line:nth-child(3) {
    transform: translateY(-6px) rotate(-45deg);
}

/* --- Active Nav Link --- */
.tb-nav-link.active {
    color: var(--tb-primary);
    position: relative;
}
.tb-nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--tb-primary), var(--tb-primary-container));
    border-radius: 1px;
}

/* --- Header scroll state --- */
#tb-header.scrolled {
    box-shadow: var(--tb-shadow-ambient);
}

/* --- Material Symbols --- */
.tb-contact .material-symbols-outlined {
    font-variation-settings: 'FILL' 0, 'wght' 400, 'GRAD' 0, 'opsz' 24;
}

/* --- Form feedback states --- */
#tb-form-feedback.tb-success {
    background: rgba(0,227,253,0.08);
    color: var(--tb-primary);
    border: 1px solid rgba(0,227,253,0.2);
}

#tb-form-feedback.tb-error {
    background: rgba(220,38,38,0.06);
    color: #dc2626;
    border: 1px solid rgba(220,38,38,0.15);
}

/* --- Submit button loading --- */
#tb-submit-btn.tb-loading {
    pointer-events: none;
    opacity: 0.6;
}

#tb-submit-btn.tb-loading .material-symbols-outlined {
    animation: tb-spin 1s linear infinite;
}

@keyframes tb-spin {
    from { transform: rotate(0deg); }
    to   { transform: rotate(360deg); }
}

/* --- Gradient text utility --- */
.tb-gradient-text {
    background-image: linear-gradient(135deg, var(--tb-primary), var(--tb-primary-container));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* --- Calendar Picker — Dark Glassmorphism --- */
@keyframes tb-cal-fadeIn {
    from { opacity: 0; transform: translateY(-6px) scale(0.98); }
    to   { opacity: 1; transform: translateY(0) scale(1); }
}

.tb-cal-popup {
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    margin-top: 0.5rem;
    z-index: 50;
    border-radius: 1rem;
    background: linear-gradient(165deg, rgba(11,15,16,0.95) 0%, rgba(0,68,77,0.92) 100%);
    backdrop-filter: blur(24px) saturate(1.4);
    -webkit-backdrop-filter: blur(24px) saturate(1.4);
    border: 1px solid rgba(0,227,253,0.1);
    box-shadow:
        0 20px 40px -12px rgba(0,0,0,0.4),
        inset 0 1px 0 rgba(255,255,255,0.03);
    overflow: hidden;
    animation: tb-cal-fadeIn 0.25s cubic-bezier(0.16,1,0.3,1);
    max-width: 380px;
}

/* Kill Tailwind ring/outline on all calendar buttons */
.tb-cal-popup button,
.tb-cal-popup button:focus,
.tb-cal-popup button:focus-visible,
.tb-cal-popup button:active {
    outline: none !important;
    box-shadow: none !important;
    --tw-ring-shadow: none !important;
    --tw-ring-color: transparent !important;
    --tw-ring-offset-shadow: none !important;
}

/* Subtle top accent line */
.tb-cal-popup::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent 10%, rgba(0,227,253,0.3) 50%, transparent 90%);
}

/* --- Calendar Header --- */
.tb-cal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.75rem 0.875rem;
    border-bottom: 1px solid rgba(255,255,255,0.05);
}

.tb-cal-month-label {
    font-family: var(--tb-font-headline);
    font-size: 0.875rem;
    font-weight: 600;
    color: #fff;
    letter-spacing: -0.01em;
}

.tb-cal-nav-btn {
    width: 1.75rem;
    height: 1.75rem;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 0.375rem;
    border: none !important;
    outline: none !important;
    box-shadow: none !important;
    background: rgba(255,255,255,0.06);
    color: rgba(255,255,255,0.5);
    cursor: pointer;
    transition: all 0.2s ease;
}

.tb-cal-nav-btn:hover {
    background: rgba(0,227,253,0.15);
    color: var(--tb-primary-container);
}

.tb-cal-nav-btn .material-symbols-outlined {
    font-size: 1rem;
}

/* --- Weekday Headers --- */
.tb-cal-weekdays {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    text-align: center;
    padding: 0.5rem 0.75rem 0.125rem;
}

.tb-cal-weekdays span {
    font-family: var(--tb-font-body);
    font-size: 0.5625rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: rgba(0,227,253,0.35);
}

/* --- Calendar Grid --- */
.tb-cal-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 3px;
    padding: 0.25rem 0.75rem 0.5rem;
}

.tb-cal-day {
    width: 100%;
    aspect-ratio: 1;
    max-width: 38px;
    max-height: 38px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 0.5rem;
    font-family: var(--tb-font-body);
    font-size: 0.8125rem;
    font-weight: 500;
    color: rgba(255,255,255,0.8);
    background: transparent;
    border: none !important;
    outline: none !important;
    box-shadow: none !important;
    -webkit-appearance: none;
    cursor: pointer;
    transition: background 0.15s ease, color 0.15s ease;
    margin: 0 auto;
}

.tb-cal-day:focus,
.tb-cal-day:focus-visible,
.tb-cal-day:active {
    outline: none !important;
    box-shadow: none !important;
    border: none !important;
}

.tb-cal-day:hover:not(:disabled) {
    background: rgba(0,227,253,0.12);
    color: #fff;
}

.tb-cal-day--disabled {
    color: rgba(255,255,255,0.12) !important;
    cursor: not-allowed;
    opacity: 1;
    background: transparent !important;
    border: none !important;
    box-shadow: none !important;
}

.tb-cal-day--today {
    background: rgba(0,227,253,0.1);
    color: var(--tb-primary-container);
    font-weight: 600;
    border: none !important;
}

.tb-cal-day--selected {
    background: linear-gradient(135deg, var(--tb-primary), var(--tb-primary-container)) !important;
    color: #fff !important;
    font-weight: 700;
    box-shadow: 0 4px 14px -2px rgba(0,227,253,0.35) !important;
}

/* --- Time Slots Section --- */
.tb-cal-slots {
    padding: 0 0.875rem 0.875rem;
    border-top: 1px solid rgba(255,255,255,0.05);
}

.tb-cal-slots-label {
    font-family: var(--tb-font-body);
    font-size: 0.625rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: rgba(0,227,253,0.4);
    margin: 0.625rem 0 0.375rem;
}

.tb-cal-slots-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0.3125rem;
}

.tb-cal-slot {
    padding: 0.375rem 0.125rem;
    border-radius: 0.375rem;
    font-family: var(--tb-font-body);
    font-size: 0.75rem;
    font-weight: 500;
    color: rgba(255,255,255,0.65);
    background: rgba(255,255,255,0.04);
    border: 1px solid rgba(255,255,255,0.08) !important;
    outline: none !important;
    box-shadow: none !important;
    cursor: pointer;
    transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
    text-align: center;
}

.tb-cal-slot:hover {
    background: rgba(0,227,253,0.12);
    border-color: rgba(0,227,253,0.2) !important;
    color: #fff;
}

.tb-cal-slot:focus,
.tb-cal-slot:focus-visible {
    outline: none !important;
    box-shadow: none !important;
}

.tb-cal-slot--active {
    background: linear-gradient(135deg, var(--tb-primary), var(--tb-primary-container));
    color: #fff;
    border-color: transparent !important;
    box-shadow: 0 3px 10px -2px rgba(0,227,253,0.3) !important;
}

/* Responsive: 3 cols on small screens */
@media (max-width: 480px) {
    .tb-cal-slots-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    .tb-cal-popup {
        max-width: 100%;
    }
}

/* --- Responsive --- */
@media (max-width: 1023px) {
    #contact-form .flex.flex-col.lg\\:flex-row > div:first-child {
        padding-top: 3rem;
        padding-bottom: 3rem;
    }
}

@media (max-width: 639px) {
    #contact-form h1 {
        font-size: 1.75rem;
    }
}

/* --- Print --- */
@media print {
    #tb-header { position: static; }
    .tb-contact section { break-inside: avoid; }
}