:root {
    --primary: #009f88;
    --primary-dark: #006f5e;
    --primary-bright: #06c9aa;
    --primary-soft: #e7fbf7;
    --ink: #0d201d;
    --muted: #60736f;
    --line: rgba(0, 159, 136, 0.16);
    --white: #ffffff;
    --glass: rgba(255, 255, 255, 0.72);
    --shadow: 0 28px 90px rgba(7, 28, 24, 0.16);
}

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

html {
    min-height: 100%;
    overflow-x: clip;
}

body {
    min-height: 100vh;
    overflow-x: clip;
    color: var(--ink);
    font-family: "Inter", Arial, sans-serif;
    background:
        radial-gradient(circle at 8% 8%, rgba(0, 159, 136, 0.18), transparent 28rem),
        radial-gradient(circle at 92% 18%, rgba(6, 201, 170, 0.18), transparent 26rem),
        linear-gradient(135deg, #f8fffd 0%, #eefcf8 48%, #ffffff 100%);
}

button,
input {
    font: inherit;
}

button {
    border: 0;
}

a {
    color: inherit;
    text-decoration: none;
}

img {
    display: block;
    max-width: 100%;
}

.auth-page {
    position: relative;
    display: grid;
    width: 100%;
    max-width: 100%;
    min-height: 100vh;
    padding: 34px;
    overflow-x: clip;
    isolation: isolate;
}

.auth-page::before {
    content: "";
    position: fixed;
    inset: 0;
    z-index: -3;
    background-image:
        linear-gradient(rgba(0, 159, 136, 0.04) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 159, 136, 0.04) 1px, transparent 1px);
    background-size: 48px 48px;
    mask-image: radial-gradient(circle at center, #000, transparent 78%);
}

.auth-orb {
    position: fixed;
    z-index: -2;
    width: 34rem;
    height: 34rem;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.4;
    pointer-events: none;
}

.auth-orb-one {
    top: -16rem;
    left: -12rem;
    background: rgba(0, 159, 136, 0.38);
    animation: orb-drift 15s ease-in-out infinite;
}

.auth-orb-two {
    right: -14rem;
    bottom: -18rem;
    background: rgba(6, 201, 170, 0.3);
    animation: orb-drift 18s ease-in-out infinite reverse;
}

.auth-grid {
    position: relative;
    display: grid;
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
    align-items: start;
    width: min(1180px, 100%);
    max-width: 100%;
    min-width: 0;
    margin: auto;
    gap: 30px;
}

.auth-brand-panel,
.auth-card {
    position: relative;
    min-width: 0;
    max-width: 100%;
    min-height: 720px;
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.78);
    border-radius: 42px;
    background: var(--glass);
    box-shadow: var(--shadow);
    backdrop-filter: blur(28px);
}

.auth-brand-panel {
    display: flex;
    flex-direction: column;
    padding: 36px;
}

.auth-brand-panel::before,
.auth-brand-panel::after {
    content: "";
    position: absolute;
    border-radius: 50%;
    pointer-events: none;
}

.auth-brand-panel::before {
    inset: auto -18% -22% auto;
    width: 34rem;
    height: 34rem;
    background: radial-gradient(circle, rgba(0, 159, 136, 0.2), transparent 68%);
}

.auth-brand-panel::after {
    top: 12%;
    right: 12%;
    width: 9rem;
    height: 9rem;
    border: 1px solid rgba(0, 159, 136, 0.18);
    animation: ring-spin 18s linear infinite;
}

.auth-logo {
    position: relative;
    z-index: 2;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 164px;
    height: 54px;
    padding: 8px 16px;
    border-radius: 999px;
    background: linear-gradient(135deg, var(--primary), var(--primary-bright));
    box-shadow: 0 18px 44px rgba(0, 159, 136, 0.2);
    transition: transform 0.24s ease, box-shadow 0.24s ease;
}

.auth-logo:hover {
    transform: translateY(-3px) scale(1.02);
    box-shadow: 0 24px 58px rgba(0, 159, 136, 0.26);
}

.auth-logo img {
    width: 134px;
}

.auth-kicker {
    position: relative;
    z-index: 2;
    display: inline-flex;
    align-items: center;
    gap: 10px;
    margin-top: 62px;
    color: var(--primary-dark);
    font-size: 0.78rem;
    font-weight: 900;
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

.auth-kicker span {
    width: 32px;
    height: 2px;
    border-radius: 999px;
    background: var(--primary);
}

.auth-brand-panel h1 {
    position: relative;
    z-index: 2;
    max-width: 640px;
    margin-top: 24px;
    color: var(--ink);
    font-size: clamp(2.45rem, 5vw, 5.4rem);
    line-height: 0.9;
    letter-spacing: -0.08em;
}

.auth-brand-panel p {
    position: relative;
    z-index: 2;
    max-width: 560px;
    margin-top: 24px;
    color: var(--muted);
    font-size: 1.08rem;
    line-height: 1.7;
}

.auth-showcase {
    position: relative;
    z-index: 1;
    display: grid;
    justify-items: start;
    align-content: start;
    flex: 1;
    min-height: 330px;
    margin-top: 28px;
}

.auth-card-flip {
    position: relative;
    width: min(470px, 100%);
    perspective: 1600px;
    cursor: pointer;
    animation: auth-flip-float 6.5s ease-in-out infinite;
}

.auth-card-flip::before,
.auth-card-flip::after {
    content: "";
    position: absolute;
    border-radius: 999px;
    pointer-events: none;
}

.auth-card-flip::before {
    inset: -18% -12%;
    z-index: -2;
    background: radial-gradient(circle, rgba(0, 159, 136, 0.2), transparent 64%);
    filter: blur(18px);
}

.auth-card-flip::after {
    left: 12%;
    right: 12%;
    bottom: -22px;
    height: 24px;
    z-index: -1;
    background: rgba(0, 40, 34, 0.2);
    filter: blur(18px);
}

.auth-card-flip-inner {
    position: relative;
    width: 100%;
    aspect-ratio: 1.586 / 1;
    transform-style: preserve-3d;
    transition: transform 0.9s cubic-bezier(0.4, 0.2, 0.2, 1);
    will-change: transform;
}

.auth-card-flip:hover .auth-card-flip-inner,
.auth-card-flip.is-flipped .auth-card-flip-inner {
    transform: rotateY(var(--flip-rotation, 180deg));
}

.auth-card-flip-front,
.auth-card-flip-back {
    position: absolute;
    inset: 0;
    overflow: hidden;
    border-radius: 26px;
    backface-visibility: hidden;
    background: var(--white);
    box-shadow: 0 34px 72px rgba(0, 40, 34, 0.32);
}

.auth-card-flip-back {
    transform: rotateY(180deg);
}

.auth-card-flip-front img,
.auth-card-flip-back img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.auth-card-flip-hint {
    margin-top: 22px;
    color: var(--primary-dark);
    font-size: 0.78rem;
    font-weight: 900;
    letter-spacing: 0.08em;
    text-align: left;
    text-transform: uppercase;
    animation: hint-pulse 3s ease-in-out infinite;
}

.auth-trust-row {
    position: relative;
    z-index: 3;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
    margin-top: auto;
}

.auth-trust-row div {
    padding: 16px;
    border: 1px solid rgba(0, 159, 136, 0.12);
    border-radius: 20px;
    background: rgba(255, 255, 255, 0.64);
}

.auth-trust-row strong,
.auth-trust-row span {
    display: block;
}

.auth-trust-row strong {
    color: var(--ink);
    font-size: 0.9rem;
    letter-spacing: -0.03em;
}

.auth-trust-row span {
    margin-top: 3px;
    color: var(--muted);
    font-size: 0.72rem;
    font-weight: 700;
}

.auth-card {
    padding: 34px;
    overflow: visible;
}

.auth-card-glow {
    position: absolute;
    top: -80px;
    right: -90px;
    width: 240px;
    height: 240px;
    border-radius: 50%;
    background: rgba(0, 159, 136, 0.18);
    filter: blur(20px);
    pointer-events: none;
}

.auth-card-head {
    position: relative;
    z-index: 1;
}

.auth-chip {
    display: inline-flex;
    align-items: center;
    min-height: 32px;
    padding: 0 12px;
    border: 1px solid rgba(0, 159, 136, 0.14);
    border-radius: 999px;
    background: rgba(231, 251, 247, 0.9);
    color: var(--primary-dark);
    font-size: 0.74rem;
    font-weight: 900;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.auth-card h2 {
    margin-top: 20px;
    color: var(--ink);
    font-size: clamp(1.75rem, 3vw, 2.65rem);
    line-height: 1;
    letter-spacing: -0.07em;
}

.auth-card-head p {
    margin-top: 10px;
    color: var(--muted);
    font-weight: 600;
}

.auth-switch {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4px;
    margin-top: 26px;
    padding: 5px;
    border: 1px solid rgba(0, 159, 136, 0.12);
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.64);
}

.auth-switch-btn {
    position: relative;
    z-index: 2;
    min-height: 44px;
    border-radius: 999px;
    background: transparent;
    color: var(--muted);
    font-weight: 900;
    cursor: pointer;
    transition: color 0.24s ease;
}

.auth-switch-btn.is-active {
    color: var(--white);
}

.auth-switch-indicator {
    position: absolute;
    top: 5px;
    left: 5px;
    width: calc(50% - 5px);
    height: calc(100% - 10px);
    border-radius: 999px;
    background: linear-gradient(135deg, var(--primary), var(--primary-bright));
    box-shadow: 0 12px 28px rgba(0, 159, 136, 0.24);
    transition: transform 0.38s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.auth-switch[data-state="register"] .auth-switch-indicator {
    transform: translateX(100%);
}

.auth-forms {
    position: relative;
    z-index: 1;
    min-width: 0;
    max-width: 100%;
    margin-top: 24px;
}

.auth-form {
    display: none;
    min-width: 0;
    max-width: 100%;
    animation: form-enter 0.45s ease both;
}

.auth-form.is-active {
    display: grid;
    gap: 16px;
    min-width: 0;
    max-width: 100%;
}

.form-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 14px;
}

.form-row {
    display: grid;
    gap: 8px;
    min-width: 0;
    max-width: 100%;
}

.form-row label,
.label-line a {
    font-size: 0.78rem;
    font-weight: 900;
}

.form-row label {
    color: var(--ink);
}

.label-line {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
}

.label-line a {
    color: var(--primary-dark);
}

.input-shell {
    position: relative;
    display: flex;
    align-items: center;
    min-width: 0;
    max-width: 100%;
    min-height: 54px;
    border: 1px solid rgba(0, 159, 136, 0.13);
    border-radius: 17px;
    background: rgba(255, 255, 255, 0.82);
    box-shadow: 0 12px 28px rgba(7, 28, 24, 0.04);
    transition: border-color 0.24s ease, box-shadow 0.24s ease, transform 0.24s ease;
}

.input-shell:focus-within {
    border-color: rgba(0, 159, 136, 0.46);
    box-shadow: 0 18px 40px rgba(0, 159, 136, 0.12);
    transform: translateY(-2px);
}

.input-icon {
    display: inline-flex;
    flex-shrink: 0;
    align-items: center;
    justify-content: center;
    width: 42px;
    color: var(--primary);
    font-size: 0.82rem;
    font-weight: 900;
}

.input-shell input {
    flex: 1;
    min-width: 0;
    width: auto;
    height: 100%;
    border: 0;
    outline: 0;
    background: transparent;
    color: var(--ink);
    font-weight: 700;
}

.input-shell input::placeholder {
    color: rgba(96, 115, 111, 0.62);
    font-weight: 600;
}

.password-toggle,
.calendar-toggle {
    flex-shrink: 0;
}

.password-toggle {
    margin-right: 10px;
    padding: 8px 10px;
    border-radius: 999px;
    background: rgba(0, 159, 136, 0.08);
    color: var(--primary-dark);
    font-size: 0.68rem;
    font-weight: 900;
    cursor: pointer;
    transition: background 0.2s ease, transform 0.2s ease;
}

.password-toggle:hover {
    background: rgba(0, 159, 136, 0.14);
    transform: translateY(-1px);
}

.calendar-toggle {
    margin-right: 10px;
    padding: 8px 10px;
    border-radius: 999px;
    background: rgba(0, 159, 136, 0.08);
    color: var(--primary-dark);
    font-size: 0.68rem;
    font-weight: 900;
    cursor: pointer;
    transition: background 0.2s ease, transform 0.2s ease;
}

.calendar-toggle:hover {
    background: rgba(0, 159, 136, 0.14);
    transform: translateY(-1px);
}

.datepicker {
    position: relative;
}

.calendar-popover {
    position: absolute;
    top: calc(100% + 12px);
    left: 0;
    z-index: 20;
    width: min(340px, 100%);
    padding: 16px;
    border: 1px solid rgba(0, 159, 136, 0.16);
    border-radius: 24px;
    background:
        radial-gradient(circle at 88% 0%, rgba(0, 159, 136, 0.14), transparent 34%),
        rgba(255, 255, 255, 0.96);
    box-shadow: 0 26px 72px rgba(7, 28, 24, 0.18);
    backdrop-filter: blur(22px);
    opacity: 0;
    transform: translateY(10px) scale(0.98);
    pointer-events: none;
    transition: opacity 0.24s ease, transform 0.24s ease;
}

.datepicker.is-open .calendar-popover {
    opacity: 1;
    transform: translateY(0) scale(1);
    pointer-events: auto;
}

.calendar-head {
    display: grid;
    grid-template-columns: 36px 1fr 36px;
    align-items: center;
    gap: 8px;
    margin-bottom: 14px;
}

.calendar-head button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: rgba(0, 159, 136, 0.09);
    color: var(--primary-dark);
    font-size: 1.25rem;
    font-weight: 900;
    cursor: pointer;
    transition: background 0.2s ease, transform 0.2s ease;
}

.calendar-head button:hover {
    background: rgba(0, 159, 136, 0.16);
    transform: translateY(-1px);
}

.calendar-current {
    display: grid;
    justify-items: center;
    gap: 6px;
}

.calendar-title {
    color: var(--ink);
    font-size: 0.92rem;
    text-align: center;
    text-transform: capitalize;
}

.calendar-year {
    width: min(132px, 100%);
    height: 34px;
    padding: 0 12px;
    border: 1px solid rgba(0, 159, 136, 0.16);
    border-radius: 999px;
    outline: 0;
    background:
        linear-gradient(180deg, rgba(255, 255, 255, 0.98), rgba(239, 252, 249, 0.92));
    color: var(--primary-dark);
    font-size: 0.76rem;
    font-weight: 900;
    cursor: pointer;
    box-shadow: 0 8px 18px rgba(7, 28, 24, 0.06);
}

.calendar-year:focus {
    border-color: rgba(0, 159, 136, 0.46);
    box-shadow: 0 10px 24px rgba(0, 159, 136, 0.14);
}

.calendar-weekdays,
.calendar-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 6px;
}

.calendar-weekdays {
    margin-bottom: 8px;
}

.calendar-weekdays span {
    color: var(--muted);
    font-size: 0.62rem;
    font-weight: 900;
    text-align: center;
}

.calendar-day {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    aspect-ratio: 1;
    border-radius: 12px;
    background: transparent;
    color: var(--ink);
    font-size: 0.76rem;
    font-weight: 800;
    cursor: pointer;
    transition: background 0.18s ease, color 0.18s ease, transform 0.18s ease, box-shadow 0.18s ease;
}

.calendar-day:hover {
    background: var(--primary-soft);
    color: var(--primary-dark);
    transform: translateY(-1px);
}

.calendar-day.is-muted {
    color: rgba(96, 115, 111, 0.42);
}

.calendar-day.is-selected {
    background: linear-gradient(135deg, var(--primary), var(--primary-bright));
    color: var(--white);
    box-shadow: 0 10px 24px rgba(0, 159, 136, 0.22);
}

.plan-selector {
    display: grid;
    gap: 10px;
    border: 0;
}

.plan-selector legend {
    margin-bottom: 8px;
    color: var(--ink);
    font-size: 0.78rem;
    font-weight: 900;
}

.plan-option {
    cursor: pointer;
}

.plan-option input {
    position: absolute;
    width: 1px;
    height: 1px;
    opacity: 0;
    pointer-events: none;
}

.plan-option-card {
    --plan-radio-size: 24px;
    --plan-radio-dot: 14px;
    --plan-radio-top: 18px;
    --plan-radio-left: 16px;
    position: relative;
    display: grid;
    gap: 7px;
    min-width: 0;
    max-width: 100%;
    padding: 14px 16px 14px 46px;
    border: 1px solid rgba(0, 159, 136, 0.13);
    border-radius: 18px;
    background: rgba(255, 255, 255, 0.76);
    box-shadow: 0 12px 28px rgba(7, 28, 24, 0.04);
    transition: transform 0.22s ease, border-color 0.22s ease, background 0.22s ease, box-shadow 0.22s ease;
}

.plan-option-card::before {
    content: "";
    position: absolute;
    top: var(--plan-radio-top);
    left: var(--plan-radio-left);
    width: var(--plan-radio-size);
    height: var(--plan-radio-size);
    border: 2px solid rgba(0, 159, 136, 0.32);
    border-radius: 50%;
    background: var(--white);
    box-sizing: border-box;
}

.plan-option-card::after {
    content: "";
    position: absolute;
    top: calc(var(--plan-radio-top) + (var(--plan-radio-size) - var(--plan-radio-dot)) / 2);
    left: calc(var(--plan-radio-left) + (var(--plan-radio-size) - var(--plan-radio-dot)) / 2);
    width: var(--plan-radio-dot);
    height: var(--plan-radio-dot);
    border-radius: 50%;
    background: var(--white);
    opacity: 0;
    transform: scale(0.4);
    transition: opacity 0.2s ease, transform 0.2s ease;
}

.plan-option-card small {
    width: max-content;
    padding: 4px 9px;
    border-radius: 999px;
    background: rgba(0, 159, 136, 0.09);
    color: var(--primary-dark);
    font-size: 0.62rem;
    font-weight: 900;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.plan-option-card strong {
    color: var(--ink);
    font-size: 0.86rem;
    line-height: 1.25;
    letter-spacing: -0.03em;
}

.plan-option-card span {
    color: var(--muted);
    font-size: 0.72rem;
    font-weight: 700;
    line-height: 1.45;
}

.plan-option-prices {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 6px;
    margin-top: 2px;
}

.plan-option-prices span {
    display: flex;
    align-items: center;
    min-height: 32px;
    padding: 7px 8px;
    border-radius: 10px;
    background: rgba(0, 159, 136, 0.08);
    color: var(--primary-dark);
    font-size: 0.66rem;
    font-weight: 900;
    line-height: 1.25;
}

.plan-option-note {
    display: block;
    color: var(--primary-dark);
    font-size: 0.68rem;
    font-weight: 900;
}

.plan-option:hover .plan-option-card {
    transform: translateY(-2px);
    border-color: rgba(0, 159, 136, 0.3);
    box-shadow: 0 18px 42px rgba(0, 159, 136, 0.1);
}

.plan-option input:checked + .plan-option-card {
    border-color: rgba(0, 159, 136, 0.42);
    background:
        radial-gradient(circle at 96% 0%, rgba(255, 255, 255, 0.28), transparent 34%),
        linear-gradient(135deg, var(--primary), var(--primary-bright));
    box-shadow: 0 20px 48px rgba(0, 159, 136, 0.22);
}

.plan-option input:checked + .plan-option-card::before {
    border-color: rgba(255, 255, 255, 0.92);
    background: rgba(255, 255, 255, 0.18);
}

.plan-option input:checked + .plan-option-card::after {
    opacity: 1;
    transform: scale(1);
}

.plan-option input:checked + .plan-option-card small,
.plan-option input:checked + .plan-option-card strong,
.plan-option input:checked + .plan-option-card span {
    color: var(--white);
}

.plan-option input:checked + .plan-option-card small {
    background: rgba(255, 255, 255, 0.18);
}

.plan-option input:checked + .plan-option-card .plan-option-prices span {
    background: rgba(255, 255, 255, 0.18);
    color: var(--white);
}

.plan-option input:checked + .plan-option-card .plan-option-note {
    color: var(--white);
}

.remember-line {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    color: var(--muted);
    font-size: 0.78rem;
    font-weight: 700;
    line-height: 1.45;
}

.remember-line input {
    width: 17px;
    height: 17px;
    margin-top: 2px;
    accent-color: var(--primary);
}

.auth-submit {
    position: relative;
    overflow: hidden;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    min-height: 56px;
    border-radius: 18px;
    background: linear-gradient(135deg, var(--primary), var(--primary-bright));
    color: var(--white);
    font-weight: 900;
    cursor: pointer;
    box-shadow: 0 18px 44px rgba(0, 159, 136, 0.24);
    transition: transform 0.24s ease, box-shadow 0.24s ease;
}

.auth-submit::before {
    content: "";
    position: absolute;
    inset: 0 auto 0 -50%;
    width: 42%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.34), transparent);
    transform: skewX(-16deg);
    transition: left 0.58s ease;
}

.auth-submit:hover {
    transform: translateY(-3px);
    box-shadow: 0 24px 58px rgba(0, 159, 136, 0.3);
}

.auth-submit:hover::before {
    left: 120%;
}

.auth-submit.is-success {
    background: linear-gradient(135deg, #007563, #00b89d);
    box-shadow: 0 18px 44px rgba(0, 117, 99, 0.26);
}

.auth-submit span {
    font-size: 1.1rem;
}

.auth-divider {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    align-items: center;
    gap: 12px;
    margin: 22px 0 14px;
    color: var(--muted);
    font-size: 0.7rem;
    font-weight: 900;
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.auth-divider span {
    height: 1px;
    background: rgba(0, 159, 136, 0.14);
}

.social-actions {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.social-actions button,
.social-actions a.social-actions-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 48px;
    border: 1px solid rgba(0, 159, 136, 0.12);
    border-radius: 16px;
    background: rgba(255, 255, 255, 0.72);
    color: var(--ink);
    font-weight: 900;
    text-decoration: none;
    cursor: pointer;
    transition: transform 0.22s ease, border-color 0.22s ease, background 0.22s ease;
}

.social-actions button:hover,
.social-actions a.social-actions-btn:hover {
    transform: translateY(-2px);
    border-color: rgba(0, 159, 136, 0.28);
    background: var(--white);
}

.auth-terms {
    position: relative;
    z-index: 1;
    margin-top: 16px;
    color: var(--muted);
    font-size: 0.72rem;
    font-weight: 700;
    line-height: 1.55;
    text-align: center;
}

@keyframes orb-drift {
    0%, 100% { transform: translate(0, 0) scale(1); }
    50%      { transform: translate(32px, -24px) scale(1.08); }
}

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

@keyframes auth-flip-float {
    0%, 100% { transform: translateY(0); }
    50%      { transform: translateY(-16px); }
}

@keyframes hint-pulse {
    0%, 100% { opacity: 0.68; transform: translateY(0); }
    50%      { opacity: 1; transform: translateY(-2px); }
}

@keyframes form-enter {
    from {
        opacity: 0;
        transform: translateY(16px) scale(0.98);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

@media (max-width: 1040px) {
    .auth-page {
        padding: 22px;
    }

    .auth-grid {
        grid-template-columns: minmax(0, 1fr);
    }

    .form-grid {
        grid-template-columns: 1fr;
    }

    .auth-brand-panel,
    .auth-card {
        min-height: auto;
    }

    .auth-brand-panel {
        padding: 28px;
    }

    .auth-kicker {
        margin-top: 42px;
    }

    .auth-showcase {
        min-height: 240px;
    }

    .auth-card-flip {
        width: min(420px, 90%);
    }
}

@media (max-width: 720px) {
    .auth-page {
        padding: 14px;
    }

    .auth-grid {
        gap: 16px;
    }

    .auth-brand-panel,
    .auth-card {
        border-radius: 30px;
    }

    .auth-brand-panel {
        padding: 22px;
    }

    .auth-logo {
        width: 146px;
        height: 48px;
    }

    .auth-logo img {
        width: 118px;
    }

    .auth-kicker {
        margin-top: 34px;
        font-size: 0.68rem;
    }

    .auth-brand-panel h1 {
        font-size: clamp(2.3rem, 13vw, 3.6rem);
    }

    .auth-brand-panel p {
        font-size: 0.98rem;
    }

    .auth-showcase {
        min-height: 210px;
        margin-top: 24px;
    }

    .auth-card-flip {
        width: min(360px, 100%);
    }

    .auth-card-flip-front,
    .auth-card-flip-back {
        border-radius: 18px;
    }

    .auth-card-flip-hint {
        margin-top: 16px;
        font-size: 0.68rem;
    }

    .auth-trust-row {
        grid-template-columns: 1fr;
        margin-top: 24px;
    }

    .auth-card {
        padding: 22px;
        overflow-x: clip;
    }

    .auth-card-glow {
        right: -40px;
    }

    .form-grid,
    .social-actions {
        grid-template-columns: 1fr;
    }

    .auth-switch-btn {
        min-height: 42px;
    }

    .input-shell {
        min-height: 52px;
    }

    .calendar-popover {
        width: 100%;
        max-width: 100%;
    }

    .plan-option-card small {
        max-width: 100%;
    }

    .plan-option-card strong,
    .plan-option-card span,
    .remember-line span,
    .auth-terms {
        overflow-wrap: anywhere;
    }

    .plan-option-prices {
        grid-template-columns: 1fr;
    }

    .auth-card-flip::before {
        inset: -12% -6%;
    }
}

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