/* Typography */

.k-display {
    margin: 0;
    font-size: clamp(3.3rem, 8vw, var(--k-text-6xl));
    line-height: .94;
    letter-spacing: -.06em;
    font-weight: var(--k-weight-semibold);
    text-wrap: balance;
}

.k-h1,
.k-h2,
.k-h3 {
    margin: 0;
    color: var(--k-text);
    letter-spacing: -.035em;
    text-wrap: balance;
}

.k-h1 {
    font-size: clamp(2.9rem, 7vw, var(--k-text-5xl));
    line-height: 1;
}

.k-h2 {
    font-size: clamp(2.3rem, 5vw, var(--k-text-4xl));
    line-height: 1.05;
}

.k-h3 {
    font-size: clamp(1.35rem, 3vw, var(--k-text-2xl));
    line-height: 1.15;
}

.k-lead {
    margin: 0;
    max-width: 760px;
    color: var(--k-text-secondary);
    font-size: clamp(1.12rem, 2vw, 1.4rem);
    line-height: 1.55;
    letter-spacing: -.012em;
}

.k-body {
    color: var(--k-text-secondary);
    font-size: var(--k-text-md);
    line-height: var(--k-leading-relaxed);
}

/* Buttons */

.k-button {
    appearance: none;
    border: 1px solid transparent;
    border-radius: var(--k-radius-pill);
    min-height: 46px;
    padding: .74rem 1.12rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--k-space-2);
    cursor: pointer;
    text-decoration: none;
    font-weight: var(--k-weight-semibold);
    transition:
        transform var(--k-duration-fast) var(--k-ease-standard),
        box-shadow var(--k-duration-normal) var(--k-ease-standard),
        border-color var(--k-duration-normal) var(--k-ease-standard),
        background-color var(--k-duration-normal) var(--k-ease-standard);
}

.k-button:hover {
    transform: translateY(-1px);
}

.k-button:active {
    transform: translateY(0);
}

.k-button:focus-visible {
    outline: 3px solid var(--k-focus);
    outline-offset: 3px;
}

.k-button--primary {
    color: var(--k-white);
    background: var(--k-ink-950);
    box-shadow: 0 8px 20px rgba(11, 17, 23, .10);
}

.k-button--primary:hover {
    background: var(--k-ink-800);
    box-shadow: 0 12px 26px rgba(11, 17, 23, .14);
}

.k-button--secondary {
    color: var(--k-text);
    background: var(--k-white);
    border-color: var(--k-border);
    box-shadow: var(--k-shadow-xs);
}

.k-button--secondary:hover {
    border-color: var(--k-border-strong);
    box-shadow: var(--k-shadow-sm);
}

.k-button--accent {
    color: var(--k-white);
    background: linear-gradient(135deg, var(--k-blue-600), var(--k-blue-400));
    box-shadow: 0 10px 26px rgba(38, 151, 232, .20);
}

.k-button--ghost {
    min-height: auto;
    padding-inline: 0;
    color: var(--k-accent-strong);
    border-radius: 0;
}

.k-button--sm {
    min-height: 38px;
    padding: .55rem .9rem;
    font-size: var(--k-text-sm);
}

.k-button--lg {
    min-height: 52px;
    padding: .88rem 1.35rem;
}

/* Cards */

.k-card {
    border: 1px solid var(--k-border);
    border-radius: var(--k-radius-lg);
    background: var(--k-surface);
    box-shadow: var(--k-shadow-xs);
    overflow: hidden;
}

.k-card--interactive {
    transition:
        transform var(--k-duration-normal) var(--k-ease-standard),
        box-shadow var(--k-duration-normal) var(--k-ease-standard),
        border-color var(--k-duration-normal) var(--k-ease-standard);
}

.k-card--interactive:hover {
    transform: translateY(-3px);
    border-color: var(--k-blue-200);
    box-shadow: var(--k-shadow-md);
}

.k-card__body {
    padding: clamp(1.25rem, 3vw, 2rem);
}

.k-card__icon {
    width: 44px;
    height: 44px;
    border-radius: 14px;
    display: grid;
    place-items: center;
    color: var(--k-blue-700);
    background: var(--k-blue-100);
    margin-bottom: var(--k-space-5);
}

.k-card__title {
    margin: 0 0 var(--k-space-2);
    font-size: var(--k-text-xl);
    letter-spacing: -.025em;
}

.k-card__text {
    margin: 0;
    color: var(--k-text-secondary);
    line-height: 1.6;
}

/* Pills / badges */

.k-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--k-space-2);
    min-height: 28px;
    padding: .28rem .7rem;
    border-radius: var(--k-radius-pill);
    border: 1px solid var(--k-border);
    background: var(--k-white);
    color: var(--k-text-secondary);
    font-size: var(--k-text-xs);
    font-weight: var(--k-weight-semibold);
}

.k-badge--blue {
    color: var(--k-blue-700);
    background: var(--k-blue-050);
    border-color: var(--k-blue-200);
}

.k-badge--success {
    color: var(--k-success);
    background: #effaf4;
    border-color: #ccebd9;
}

/* Section headings */

.k-section-header {
    display: grid;
    gap: var(--k-space-4);
    margin-bottom: clamp(2rem, 5vw, 4rem);
}

.k-section-header--center {
    text-align: center;
    justify-items: center;
}

/* Forms */

.k-field {
    display: grid;
    gap: var(--k-space-2);
}

.k-label {
    font-size: var(--k-text-sm);
    font-weight: var(--k-weight-semibold);
}

.k-input,
.k-select,
.k-textarea {
    width: 100%;
    min-height: 46px;
    border: 1px solid var(--k-border);
    border-radius: var(--k-radius-md);
    background: var(--k-white);
    color: var(--k-text);
    padding: .8rem .9rem;
    transition:
        border-color var(--k-duration-fast) var(--k-ease-standard),
        box-shadow var(--k-duration-fast) var(--k-ease-standard);
}

.k-textarea {
    min-height: 130px;
    resize: vertical;
}

.k-input:focus,
.k-select:focus,
.k-textarea:focus {
    outline: none;
    border-color: var(--k-blue-400);
    box-shadow: 0 0 0 4px var(--k-focus);
}

/* Notice */

.k-notice {
    border: 1px solid var(--k-blue-200);
    border-radius: var(--k-radius-md);
    background: var(--k-blue-050);
    padding: var(--k-space-4) var(--k-space-5);
    color: var(--k-ink-700);
}

/* Hero concept */

.k-neural-orbit {
    position: relative;
    aspect-ratio: 1;
    border: 1px solid var(--k-border);
    border-radius: 50%;
    background:
        radial-gradient(circle at center, rgba(38,151,232,.14), transparent 27%),
        radial-gradient(circle at center, rgba(38,151,232,.06), transparent 58%);
    box-shadow: var(--k-shadow-lg);
    isolation: isolate;
}

.k-neural-orbit::before,
.k-neural-orbit::after {
    content: "";
    position: absolute;
    inset: 50% 8% auto;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--k-blue-400), transparent);
    transform-origin: center;
}

.k-neural-orbit::before {
    transform: rotate(35deg);
}

.k-neural-orbit::after {
    transform: rotate(-35deg);
}

.k-neural-core {
    position: absolute;
    inset: 50% auto auto 50%;
    width: clamp(92px, 20%, 126px);
    aspect-ratio: 1;
    transform: translate(-50%, -50%);
    border-radius: 50%;
    display: grid;
    place-items: center;
    background: var(--k-white);
    color: var(--k-ink-950);
    border: 2px solid var(--k-blue-500);
    box-shadow: 0 18px 42px rgba(38,151,232,.16);
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: var(--k-weight-semibold);
}

.k-neural-node {
    position: absolute;
    width: 14px;
    aspect-ratio: 1;
    border-radius: 50%;
    background: var(--k-blue-500);
    box-shadow: 0 0 0 7px rgba(38,151,232,.08);
}

.k-neural-node:nth-of-type(1) { left: 16%; top: 23%; }
.k-neural-node:nth-of-type(2) { right: 15%; top: 20%; }
.k-neural-node:nth-of-type(3) { left: 9%; top: 53%; }
.k-neural-node:nth-of-type(4) { right: 8%; top: 56%; }
.k-neural-node:nth-of-type(5) { left: 28%; bottom: 12%; }
.k-neural-node:nth-of-type(6) { right: 24%; bottom: 13%; }