/* =========================================
   HOME SECTION — HERO
   Two-row grid: copy on top, graphics below.
   Separate tracks = graphics can never
   overlap or stack on top of the text.
========================================= */

.hero {
    position: relative;
    width: 100%;
    height: calc(100vh - 64px);
    display: grid;
    overflow: hidden;
    padding: clamp(28px, 5vh, 54px) clamp(20px, 4.8vw, 62px) 0;
    z-index: 10;
}

.hero-inner {
    width: 100%;
    max-width: 1320px;
    min-height: 0;
    margin: 0 auto;
    display: grid;
    grid-template-rows: auto minmax(0, 1fr);
    row-gap: clamp(18px, 4vh, 42px);
}

/* Strict hide: prevent ANY hero child from bleeding */
.hero.is-hidden,
.hero.is-hidden * {
    display: none !important;
    opacity: 0 !important;
    visibility: hidden !important;
    pointer-events: none !important;
}

/* ---- Hero Text Block ---- */

.hero-text {
    max-width: 620px;
}

.hero-text h1 {
    font-size: clamp(42px, 5.2vw, 64px);
    font-weight: 900;
    letter-spacing: -1px;
    margin-bottom: 14px;
    color: var(--text-white);
}

.hero-text h2 {
    font-family: var(--font-mono);
    font-size: clamp(15px, 1.9vw, 21px);
    font-weight: 600;
    letter-spacing: 0.5px;
    color: var(--primary);
    margin-bottom: 14px;
}

.hero-text p {
    font-size: clamp(14px, 1.2vw, 17px);
    color: var(--text-muted);
    line-height: 1.7;
    max-width: 520px;
    margin-bottom: 26px;
}

/* ---- Hero Action Buttons ---- */

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
}

.hero-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 13px 28px;
    border-radius: 6px;
    font-family: var(--font-mono);
    font-size: 13px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition);
    border: none;
}

.hero-btn-primary {
    background: var(--primary);
    color: var(--bg-darker);
}

.hero-btn-primary:hover {
    background: #ffffff;
    color: var(--bg-darker);
    box-shadow: 0 0 20px rgba(255, 208, 0, 0.4);
    transform: translateY(-2px);
}

.hero-btn-secondary {
    background: rgba(255, 255, 255, 0.06);
    color: var(--text-white);
    border: 1px solid var(--border-glass);
}

.hero-btn-secondary:hover {
    background: rgba(255, 255, 255, 0.14);
    border-color: rgba(255, 255, 255, 0.3);
    transform: translateY(-2px);
}


/* =========================================
   GRAPHICS STAGE — cars left, LEDs right
========================================= */

.hero-stage {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    column-gap: clamp(18px, 5vw, 90px);
    align-items: end;
    min-height: 0;
    padding-bottom: 0;
}


/* =========================================
   ROBOT CAR — single lead car with
   state-based animation classes

   States (JS classes):
   .car-driving  → wheels spin
   .car-idle     → gentle bob, wheels stopped
   .car-exiting  → driving + subtle body tilt
========================================= */

.car-lane {
    position: relative;
    min-width: 0;
    align-self: end;
    padding-bottom: clamp(24px, 3.2vw, 42px);
    overflow: visible;
}

.car-convoy {
    display: flex;
    align-items: flex-end;
    gap: clamp(10px, 2.6vw, 44px);
    list-style: none;
}

.robot-car {
    position: relative;
    flex: 0 0 auto;
    width: clamp(320px, min(52vw, 66vh), 680px);
    opacity: 0;
    will-change: transform, opacity;
}

/* Only the lead car is visible */
.robot-car--mid,
.robot-car--tail {
    display: none;
}

/* Ground shadow — scoped inside each car */
.robot-car::after {
    content: "";
    position: absolute;
    z-index: 0;
    left: -6%;
    right: -6%;
    bottom: -15%;
    height: 17%;
    border-radius: 50%;
    background: radial-gradient(ellipse at center, rgba(0, 0, 0, 0.6) 0%, transparent 72%);
    transition: opacity 0.4s ease;
}

.robot-body {
    position: relative;
    z-index: 2;
    display: block;
    width: 100%;
    height: auto;
    filter: drop-shadow(0 6px 18px rgba(0, 0, 0, 0.6));
}

/* ---- Wheels ---- */

.robot-wheel {
    position: absolute;
    z-index: 3;
    width: 28%;
    height: auto;
    bottom: -8%;
    animation: none;
    transition: none;
}

.robot-wheel-rear  { left: 8%; }
.robot-wheel-front { right: 14%; }

.robot-car.car-driving .robot-wheel {
    animation: spinWheels 0.5s linear infinite;
}

.robot-car.car-idle .robot-wheel {
    animation: none !important;
    transform: rotate(0deg) !important;
}

.robot-car.car-exiting .robot-wheel {
    animation: spinWheels 0.3s linear infinite;
}

@keyframes spinWheels {
    to { transform: rotate(360deg); }
}

/* ---- Idle Bob — gentle floating when parked ---- */

.robot-car.car-idle {
    animation: carIdleBob 3.2s cubic-bezier(0.45, 0, 0.55, 1) infinite;
}

@keyframes carIdleBob {
    0%, 100% { transform: translateY(0); }
    50%      { transform: translateY(-4px); }
}

.robot-car.car-exiting .robot-body {
    transition: transform 800ms cubic-bezier(0.33, 1, 0.68, 1);
    transform: rotate(-1.5deg) translateY(-2px);
}

/* ---- Detector Waves (WiFi-style, right-facing) ---- */

.detector {
    position: absolute;
    z-index: 4;
    right: -10px;
    top: 18%;
    display: flex;
    flex-direction: column;
    gap: 3px;
}

.wave {
    display: block;
    border-right: 2px solid var(--accent-green);
    border-top: 2px solid var(--accent-green);
    border-radius: 0 8px 0 0;
    opacity: 0;
    animation: wavePulse 1.5s infinite;
}

.wave-1 { width: 8px;  height: 5px;  animation-delay: 0s; }
.wave-2 { width: 13px; height: 8px;  animation-delay: 0.25s; }
.wave-3 { width: 18px; height: 11px; animation-delay: 0.5s; }

.car-lane.is-moving .wave {
    animation-duration: 0.7s;
}

@keyframes wavePulse {
    0%   { opacity: 0; transform: scale(0.8); }
    50%  { opacity: 0.9; }
    100% { opacity: 0; transform: scale(1.15); }
}


/* =========================================
   HERO EXIT ANIMATIONS (drive-active)
   Text clears out while the convoy drives off
========================================= */

@keyframes heroExitText {
    0%   { opacity: 1; transform: translateX(0); }
    100% { opacity: 0; transform: translateX(-80px); }
}

@keyframes heroExitButton {
    0%   { opacity: 1; transform: translateY(0); }
    100% { opacity: 0; transform: translateY(30px); }
}

.hero.drive-active .hero-text h1 {
    animation: heroExitText 0.9s cubic-bezier(0.4, 0, 0.2, 1) 0s both;
}

.hero.drive-active .hero-text h2 {
    animation: heroExitText 0.9s cubic-bezier(0.4, 0, 0.2, 1) 0.06s both;
}

.hero.drive-active .hero-text p {
    animation: heroExitText 0.9s cubic-bezier(0.4, 0, 0.2, 1) 0.12s both;
}

.hero.drive-active .hero-actions {
    animation: heroExitButton 0.8s cubic-bezier(0.4, 0, 0.2, 1) 0.15s both;
}


/* =========================================
   LED GROUP — three standing LEDs
========================================= */

.led-group {
    display: flex;
    align-items: flex-end;
    align-self: end;
    gap: clamp(14px, 3vw, 44px);
    padding-bottom: 0;
}

.led {
    position: relative;
    width: clamp(60px, min(9vw, 17vh), 120px);
    display: flex;
    justify-content: center;
    transition: transform 0.5s cubic-bezier(0.16, 1, 0.3, 1),
                opacity 0.5s ease;
}

.led.drop {
    transform: translateY(60px);
    opacity: 0;
}

.led.hidden {
    visibility: hidden;
}

.led-image {
    position: relative;
    z-index: 2;
    width: 100%;
    height: auto;
    filter: brightness(0.28) saturate(1.15) contrast(1.05);
    transition: filter 0.4s ease;
}

.glow {
    position: absolute;
    top: 2%;
    left: 50%;
    transform: translateX(-50%);
    width: 58%;
    height: auto;
    aspect-ratio: 1;
    border-radius: 50%;
    opacity: 0;
    transition: opacity 0.4s ease;
    z-index: 1;
}

/* LED ON states */
.led.red.on .led-image {
    filter: brightness(1.2) saturate(1.5);
}
.led.red.on .glow {
    opacity: 1;
    background: radial-gradient(circle, rgba(255, 60, 60, 0.7) 0%, transparent 70%);
    box-shadow: 0 0 18px rgba(255, 60, 60, 0.42);
}

.led.yellow.on .led-image {
    filter: brightness(1.3) saturate(1.5);
}
.led.yellow.on .glow {
    opacity: 1;
    background: radial-gradient(circle, rgba(255, 208, 0, 0.7) 0%, transparent 70%);
    box-shadow: 0 0 18px rgba(255, 208, 0, 0.42);
}

.led.green.on .led-image {
    filter: brightness(1.3) saturate(1.5);
}
.led.green.on .glow {
    opacity: 1;
    background: radial-gradient(circle, rgba(0, 255, 188, 0.7) 0%, transparent 70%);
    box-shadow: 0 0 18px rgba(0, 255, 188, 0.42);
}