:root {
    --ink: #1b2b26;
    --ink-soft: #46574f;
    --muted: #6b7b73;
    --paper: #f3f7f5;
    --surface: #ffffff;
    --surface-2: #e9f0ec;
    --line: #e1e8e4;
    --line-strong: #cbd6d0;
    --brand: #12805e;
    --brand-deep: #0d664a;
    --brand-tint: #e3f3ec;
    --accent: #d9481f;
    --accent-deep: #b93a15;
    --accent-tint: #ffe9e1;
    --ok: #1f7a4d;
    --ok-tint: #dff3e8;
    --warn: #9a6700;
    --warn-tint: #fbefcf;
    --err: #b3261e;
    --err-tint: #fde7e5;

    --font-display: 'Cairo', 'Segoe UI', Tahoma, sans-serif;
    --font-body: 'Cairo', 'Segoe UI', Tahoma, sans-serif;

    --s1: 4px;
    --s2: 8px;
    --s3: 16px;
    --s4: 24px;
    --s5: 32px;
    --s6: 48px;
    --s7: 64px;
    --s8: 96px;

    --r-sm: 8px;
    --r-md: 12px;
    --r-lg: 20px;

    --pop: 0 12px 24px -10px rgba(27, 43, 38, 0.35);
    --pop-sm: 0 3px 8px -3px rgba(27, 43, 38, 0.3);
    --soft: 0 1px 2px rgba(27, 43, 38, 0.05), 0 12px 32px -14px rgba(27, 43, 38, 0.2);

    --ease: cubic-bezier(0.22, 0.8, 0.28, 1);
    --ease-spring: cubic-bezier(0.34, 1.4, 0.5, 1);
}

*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.7;
    color: var(--ink);
    background: var(--paper);
    min-height: 100vh;
}

h1,
h2,
h3,
h4 {
    font-family: var(--font-display);
    font-weight: 800;
    line-height: 1.3;
}

a {
    color: var(--brand);
    text-underline-offset: 3px;
}

a:hover {
    color: var(--accent);
}

img {
    max-width: 100%;
}

:focus-visible {
    outline: 3px solid var(--accent);
    outline-offset: 2px;
}

::selection {
    background: var(--brand);
    color: #fff;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--s2);
    min-height: 50px;
    padding: 0 var(--s4);
    font-family: var(--font-body);
    font-size: 16px;
    font-weight: 700;
    line-height: 1;
    color: var(--ink);
    background: var(--surface);
    border: 1px solid var(--line-strong);
    border-radius: var(--r-md);
    box-shadow: var(--pop-sm);
    cursor: pointer;
    text-decoration: none;
    transition: transform 0.2s var(--ease), box-shadow 0.2s var(--ease), background-color 0.2s var(--ease), color 0.2s var(--ease);
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--pop);
    color: var(--ink);
}

.btn:active {
    transform: translateY(1px);
    box-shadow: var(--pop-sm);
}

.btn-primary {
    background: var(--brand);
    border-color: var(--brand);
    color: #fff;
}

.btn-primary:hover {
    background: var(--brand-deep);
    color: #fff;
}

.btn-accent {
    background: var(--accent);
    border-color: var(--accent);
    color: #fff;
}

.btn-accent:hover {
    background: var(--accent-deep);
    color: #fff;
}

.btn-ghost {
    background: transparent;
    box-shadow: none;
    border-color: transparent;
}

.btn-ghost:hover {
    background: var(--brand-tint);
    box-shadow: none;
    transform: none;
}

.btn-block {
    width: 100%;
}

.btn-sm {
    min-height: 38px;
    padding: 0 var(--s3);
    font-size: 14px;
}

.btn:disabled,
.btn.is-disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.btn.is-loading {
    pointer-events: none;
    color: transparent;
    position: relative;
}

.btn.is-loading::after {
    content: '';
    position: absolute;
    inset-inline-start: 50%;
    top: 50%;
    width: 10px;
    height: 10px;
    margin: -5px 0 0 -5px;
    border-radius: 50% 50% 50% 0;
    background: #fff;
    transform: rotate(-45deg);
    animation: drip 0.9s var(--ease) infinite;
}

@keyframes drip {
    0% {
        transform: translateY(-9px) rotate(-45deg) scale(0.6);
        opacity: 0;
    }
    40% {
        opacity: 1;
    }
    100% {
        transform: translateY(9px) rotate(-45deg) scale(1);
        opacity: 0;
    }
}

.field {
    display: block;
    margin-block-end: var(--s4);
    text-align: start;
}

.field>label,
.label {
    display: block;
    margin-block-end: var(--s2);
    font-size: 14px;
    font-weight: 700;
    color: var(--ink-soft);
}

.input,
.field input:not([type=checkbox]):not([type=radio]):not([type=file]),
.field select,
.field textarea {
    width: 100%;
    min-height: 50px;
    padding: 10px var(--s3);
    font-family: var(--font-body);
    font-size: 16px;
    color: var(--ink);
    background: var(--surface);
    border: 1.5px solid var(--line-strong);
    border-radius: var(--r-md);
    transition: box-shadow 0.2s var(--ease), border-color 0.2s var(--ease);
}

.input:focus,
.field input:focus,
.field select:focus,
.field textarea:focus {
    outline: none;
    border-color: var(--brand);
    box-shadow: 0 0 0 4px var(--brand-tint);
}

.field-hint {
    margin-block-start: var(--s2);
    font-size: 13px;
    color: var(--muted);
}

.field-error {
    margin-block-start: var(--s2);
    font-size: 13px;
    font-weight: 700;
    color: var(--err);
}

.pw-wrap {
    position: relative;
}

.pw-wrap input {
    padding-inline-end: 72px !important;
}

.pw-toggle {
    position: absolute;
    inset-inline-end: 6px;
    top: 50%;
    transform: translateY(-50%);
    min-height: 36px;
    padding: 0 var(--s3);
    font-family: var(--font-body);
    font-size: 13px;
    font-weight: 700;
    color: var(--brand);
    background: transparent;
    border: 0;
    border-radius: var(--r-sm);
    cursor: pointer;
}

.pw-toggle:hover {
    background: var(--brand-tint);
}

.message {
    display: none;
    position: relative;
    margin-block-end: var(--s4);
    padding: var(--s3);
    padding-inline-start: 52px;
    font-size: 14px;
    font-weight: 600;
    line-height: 1.6;
    border: 1px solid transparent;
    border-radius: var(--r-md);
}

.message::before {
    position: absolute;
    inset-inline-start: var(--s3);
    top: 13px;
    width: 24px;
    height: 24px;
    display: grid;
    place-items: center;
    font-size: 13px;
    font-weight: 800;
    color: #fff;
    border-radius: 50%;
}

.message.success {
    background: var(--ok-tint);
    color: #0f4a2e;
    border-color: #b5e0c6;
}

.message.success::before {
    content: '\2713';
    background: var(--ok);
    animation: pop-in 0.45s var(--ease-spring) both;
}

.message.error {
    background: var(--err-tint);
    color: #7a1a15;
    border-color: #f5c2bd;
}

.message.error::before {
    content: '!';
    background: var(--err);
}

.message.shake {
    animation: shake 0.4s var(--ease) both;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    20% { transform: translateX(-6px); }
    40% { transform: translateX(6px); }
    60% { transform: translateX(-4px); }
    80% { transform: translateX(3px); }
}

@keyframes pop-in {
    0% { transform: scale(0); }
    100% { transform: scale(1); }
}

.card {
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: var(--r-lg);
    box-shadow: var(--soft);
    padding: var(--s4);
}

.badge {
    display: inline-flex;
    align-items: center;
    padding: 2px 12px;
    font-size: 12px;
    font-weight: 700;
    color: var(--brand-deep);
    background: var(--brand-tint);
    border-radius: 999px;
}

.badge-accent {
    color: var(--accent-deep);
    background: var(--accent-tint);
}

.topbar {
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--brand);
    color: #fff;
    transition: box-shadow 0.3s var(--ease);
}

.topbar.is-scrolled {
    box-shadow: 0 8px 24px -10px rgba(13, 102, 74, 0.6);
}

.topbar-inner {
    max-width: 1280px;
    margin-inline: auto;
    padding: var(--s3) var(--s4);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--s3);
    flex-wrap: wrap;
}

.brand-mark {
    display: inline-flex;
    align-items: center;
    gap: var(--s3);
    font-family: var(--font-display);
    font-size: 24px;
    font-weight: 800;
    color: #fff;
    text-decoration: none;
}

.brand-mark:hover {
    color: #fff;
}

.reveal {
    opacity: 0;
    transform: translateY(16px);
    transition: opacity 0.6s var(--ease), transform 0.6s var(--ease);
    transition-delay: calc(var(--i, 0) * 70ms);
}

.reveal.is-in {
    opacity: 1;
    transform: none;
}

.rise {
    animation: rise 0.7s var(--ease) both;
    animation-delay: calc(var(--i, 0) * 80ms);
}

@keyframes rise {
    from {
        opacity: 0;
        transform: translateY(18px);
    }
    to {
        opacity: 1;
        transform: none;
    }
}

.flask-stage {
    position: relative;
    width: 220px;
    margin-inline: auto;
}

.flask-stage svg {
    width: 100%;
    height: auto;
    display: block;
}

.liquid {
    transform-origin: 50% 100%;
    transform-box: fill-box;
    animation: fill-up 5.5s var(--ease) 0.4s both;
}

@keyframes fill-up {
    from { transform: scaleY(0.12); }
    to { transform: scaleY(1); }
}

.bubble-dot {
    transform-box: fill-box;
    transform-origin: center;
    animation: bubble 3.2s ease-in infinite;
    opacity: 0;
}

.bubble-dot:nth-of-type(2) { animation-delay: 0.9s; }
.bubble-dot:nth-of-type(3) { animation-delay: 1.8s; }
.bubble-dot:nth-of-type(4) { animation-delay: 2.5s; }

@keyframes bubble {
    0% { transform: translateY(30px) scale(0.5); opacity: 0; }
    20% { opacity: 0.9; }
    100% { transform: translateY(-70px) scale(1); opacity: 0; }
}

.solo-wrap {
    min-height: 100vh;
    display: grid;
    place-items: center;
    padding: var(--s5) var(--s3);
    background:
        radial-gradient(circle at 12% 8%, var(--brand-tint) 0, transparent 38%),
        radial-gradient(circle at 92% 92%, var(--accent-tint) 0, transparent 36%),
        var(--paper);
}

.solo-card {
    width: 100%;
    max-width: 480px;
    padding: var(--s6) var(--s5);
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: 28px;
    box-shadow: var(--soft);
}

.solo-card .kicker {
    display: inline-flex;
    align-items: center;
    gap: var(--s2);
    margin-block-end: var(--s4);
    font-family: var(--font-display);
    font-size: 20px;
    font-weight: 800;
    color: var(--brand);
}

.solo-card .kicker i {
    width: 12px;
    height: 12px;
    background: var(--accent);
    border-radius: 50% 50% 50% 0;
    transform: rotate(-45deg);
    display: block;
}

.solo-card h1 {
    margin-block-end: var(--s2);
    font-size: 32px;
}

.solo-card .lead {
    margin-block-end: var(--s5);
    color: var(--muted);
}

.errors {
    margin-block-start: var(--s2);
    font-size: 13px;
    font-weight: 700;
    color: var(--err);
}

.errors:empty {
    display: none;
}

.loading {
    display: none;
}

.empty-state {
    padding: var(--s6) var(--s4);
    text-align: center;
    color: var(--muted);
    border: 2px dashed var(--line-strong);
    border-radius: var(--r-lg);
    background: var(--surface);
}

@media (max-width: 640px) {
    body {
        font-size: 15px;
    }

    .topbar-inner {
        padding: var(--s3);
    }

    .solo-card {
        padding: var(--s5) var(--s4);
    }
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        transition-delay: 0ms !important;
    }

    .reveal {
        opacity: 1;
        transform: none;
    }
}