/* =========================================================
   FOUNDEV — INSTITUTE STUDENT SIGNUP & EMAIL OTP
   File: css/institute-student-auth.css
   ========================================================= */

:root {
    --auth-bg: #f7f4ef;
    --auth-white: #ffffff;
    --auth-text: #191919;
    --auth-muted: #696761;
    --auth-placeholder: #a6a199;
    --auth-border: #e7e2da;
    --auth-primary: #171717;
    --auth-primary-hover: #303030;
    --auth-success: #176b43;
    --auth-danger: #b42318;
    --auth-radius: 10px;
    --auth-transition: 180ms ease;
}

/* ---------- Reset ---------- */

* {
    box-sizing: border-box;
}

html {
    min-height: 100%;
    scroll-behavior: smooth;
}

body {
    min-height: 100vh;
    margin: 0;
    background: var(--auth-bg);
    color: var(--auth-text);
    font-family: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI",
        Roboto, Arial, sans-serif;
    font-size: 14px;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

button,
input,
select {
    font: inherit;
}

button {
    cursor: pointer;
}

button:disabled {
    cursor: not-allowed;
    opacity: 0.55;
}

a {
    color: inherit;
}

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

[hidden] {
    display: none !important;
}

::selection {
    background: #242424;
    color: #ffffff;
}


/* ---------- Main Layout ---------- */

.auth-shell {
    display: grid;
    grid-template-columns: 0.9fr 1.1fr;
    gap: 24px;

    width: min(1200px, calc(100% - 48px));
    min-height: 100vh;
    margin: 0 auto;
    padding: 30px 0;
}

.auth-brand-panel,
.auth-form-panel {
    min-width: 0;
    border: 1px solid rgba(231, 226, 218, 0.9);
    border-radius: 28px;
}

.auth-brand-panel {
    position: relative;
    isolation: isolate;
    overflow: hidden;

    display: flex;
    flex-direction: column;
    justify-content: space-between;

    padding: 42px;

    background:
        radial-gradient(
            circle at 15% 15%,
            rgba(255, 255, 255, 0.9),
            transparent 36%
        ),
        linear-gradient(145deg, #eee8dd, #e5dfd4);
}

.auth-brand-panel::after {
    position: absolute;
    z-index: -1;
    right: -190px;
    bottom: 35px;

    width: 390px;
    height: 390px;

    border: 1px solid rgba(25, 25, 25, 0.08);
    border-radius: 50%;

    content: "";
    pointer-events: none;
}

.auth-form-panel {
    display: flex;
    align-items: center;
    justify-content: center;

    padding: 46px;

    background: var(--auth-white);
    box-shadow: 0 24px 70px rgba(30, 25, 18, 0.05);
}

.auth-form-container {
    width: 100%;
    max-width: 490px;
    min-width: 0;
}


/* ---------- Branding ---------- */

.auth-brand {
    display: inline-flex;
    align-items: center;
    gap: 12px;

    width: fit-content;

    color: var(--auth-text);
    font-size: 22px;
    font-weight: 800;
    letter-spacing: -0.7px;
    text-decoration: none;
}

.auth-logo {
    width: auto;
    max-width: 150px;
    height: 38px;
    object-fit: contain;
    object-position: left center;
}

.auth-brand-content {
    max-width: 460px;
    margin: 48px 0;
}

.auth-eyebrow {
    display: inline-block;
    margin-bottom: 14px;

    color: #777168;
    font-size: 10px;
    font-weight: 800;
    letter-spacing: 1.4px;
    text-transform: uppercase;
}

.auth-brand-content h1 {
    margin: 0 0 18px;

    font-size: clamp(38px, 4vw, 54px);
    font-weight: 800;
    line-height: 1.08;
    letter-spacing: -2px;
}

.auth-brand-content h1 span {
    color: #777168;
}

.auth-brand-content > p {
    max-width: 410px;
    color: #625d55;
    font-size: 14px;
    line-height: 1.85;
}

.auth-feature-list {
    display: grid;
    gap: 18px;
    margin-top: 32px;
}

.auth-feature {
    display: flex;
    align-items: flex-start;
    gap: 13px;
}

.auth-feature-icon {
    display: grid;
    flex: 0 0 38px;
    width: 38px;
    height: 38px;
    place-items: center;

    border: 1px solid rgba(25, 25, 25, 0.08);
    border-radius: 11px;
    background: rgba(255, 255, 255, 0.5);

    font-size: 12px;
    font-weight: 800;
}

.auth-feature strong {
    font-size: 13px;
    font-weight: 750;
}

.auth-feature p {
    margin: 3px 0 0;
    color: #6b665e;
    font-size: 12px;
}

.auth-brand-footer {
    margin: 28px 0 0;
    padding-top: 20px;

    border-top: 1px solid rgba(25, 25, 25, 0.1);

    color: #6b665e;
    font-size: 11px;
}

.auth-mobile-brand {
    display: none;
}


/* ---------- Form Heading ---------- */

.auth-heading {
    margin-bottom: 26px;
}

.auth-heading .auth-eyebrow {
    margin-bottom: 10px;
}

.auth-heading h2 {
    margin: 0 0 9px;

    font-size: clamp(27px, 3vw, 35px);
    font-weight: 750;
    line-height: 1.2;
    letter-spacing: -1.1px;
}

.auth-heading p {
    margin: 0;

    color: var(--auth-muted);
    font-size: 13px;
    line-height: 1.8;
}

.auth-heading strong {
    color: var(--auth-text);
    font-weight: 750;
    overflow-wrap: anywhere;
}


/* ---------- Signup Form ---------- */

#student-signup-form,
#student-otp-form {
    display: flex;
    flex-direction: column;
    gap: 17px;
}

.auth-field {
    display: flex;
    flex-direction: column;
    gap: 7px;

    min-width: 0;
}

.auth-field label {
    color: #292929;
    font-size: 12px;
    font-weight: 750;
}

.auth-field small,
.auth-form-note {
    color: #89847c;
    font-size: 11px;
    line-height: 1.65;
}

.auth-field input,
.auth-field select {
    width: 100%;
    min-width: 0;
    min-height: 47px;
    padding: 12px 13px;

    border: 1px solid var(--auth-border);
    border-radius: 8px;
    outline: none;

    background: #ffffff;
    color: var(--auth-text);

    font-size: 13px;

    transition:
        border-color var(--auth-transition),
        box-shadow var(--auth-transition),
        background var(--auth-transition);
}

.auth-field input::placeholder {
    color: var(--auth-placeholder);
    opacity: 1;
}

.auth-field input:hover,
.auth-field select:hover {
    border-color: #c9c2b8;
}

.auth-field input:focus,
.auth-field select:focus {
    border-color: #252525;
    box-shadow: 0 0 0 3px rgba(30, 30, 30, 0.07);
}

.auth-field input:disabled,
.auth-field select:disabled {
    background: #f5f4f2;
    cursor: not-allowed;
}

.auth-field input[aria-invalid="true"],
.auth-field select[aria-invalid="true"] {
    border-color: var(--auth-danger);
}

.auth-field input[aria-invalid="true"]:focus,
.auth-field select[aria-invalid="true"]:focus {
    box-shadow: 0 0 0 3px rgba(180, 35, 24, 0.09);
}

.auth-form-row {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
}


/* ---------- Select Dropdown ---------- */

.auth-field select {
    appearance: none;
    padding-right: 38px;

    background-color: #ffffff;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23706b64' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");

    background-repeat: no-repeat;
    background-position: right 13px center;
    background-size: 15px;
}

.auth-field select option {
    color: var(--auth-text);
}


/* ---------- Password Fields ---------- */

.auth-password-wrap {
    position: relative;
    width: 100%;
}

.auth-password-wrap input {
    padding-right: 68px;
}

.auth-password-toggle {
    position: absolute;
    top: 50%;
    right: 7px;
    transform: translateY(-50%);

    padding: 7px 9px;

    border: none;
    border-radius: 6px;

    background: transparent;
    color: #625d55;

    font-size: 11px;
    font-weight: 750;
}

.auth-password-toggle:hover {
    background: #f4f2ee;
    color: #171717;
}

.auth-password-toggle:focus-visible {
    outline: 2px solid #333333;
    outline-offset: 2px;
}


/* ---------- Terms and Conditions ---------- */

.auth-checkbox {
    display: flex;
    align-items: flex-start;
    gap: 10px;

    color: #625d55;
    font-size: 11px;
    line-height: 1.75;
}

.auth-checkbox input {
    flex: 0 0 16px;
    width: 16px;
    height: 16px;
    margin: 3px 0 0;

    accent-color: #171717;
    cursor: pointer;
}

.auth-checkbox span {
    min-width: 0;
}

.auth-checkbox a,
.auth-switch a,
.auth-back-link a {
    font-weight: 750;
    text-underline-offset: 3px;
}

.auth-checkbox a:hover,
.auth-switch a:hover,
.auth-back-link a:hover {
    color: #777168;
}


/* ---------- Main Buttons ---------- */

.auth-submit,
.auth-secondary-button {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;

    width: 100%;
    min-height: 48px;
    padding: 12px 16px;

    border: 1px solid transparent;
    border-radius: 8px;

    font-size: 12px;
    font-weight: 800;

    transition:
        background var(--auth-transition),
        border-color var(--auth-transition),
        box-shadow var(--auth-transition),
        transform var(--auth-transition);
}

.auth-submit {
    background: var(--auth-primary);
    color: #ffffff;
}

.auth-submit:hover:not(:disabled) {
    background: var(--auth-primary-hover);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.auth-submit:active:not(:disabled) {
    transform: translateY(1px);
}

.auth-submit:focus-visible,
.auth-secondary-button:focus-visible,
.auth-text-button:focus-visible {
    outline: 3px solid rgba(30, 30, 30, 0.2);
    outline-offset: 3px;
}

.auth-submit.is-loading {
    opacity: 0.7;
    pointer-events: none;
}


/* ---------- Secondary Button ---------- */

.auth-secondary-button {
    border-color: var(--auth-border);
    background: #ffffff;
    color: #252525;
}

.auth-secondary-button:hover:not(:disabled) {
    border-color: #c8c1b7;
    background: #f8f7f4;
}


/* ---------- Back Button ---------- */

.auth-text-button {
    align-self: center;
    padding: 7px 12px;

    border: none;
    border-radius: 6px;

    background: transparent;
    color: #625d55;

    font-size: 12px;
    font-weight: 700;
}

.auth-text-button:hover {
    color: #111111;
    text-decoration: underline;
}


/* ---------- Form Notes and Links ---------- */

.auth-form-note {
    margin: 0;
    text-align: center;
}

.auth-switch {
    margin-top: 23px;
    color: #69645c;
    font-size: 12px;
    text-align: center;
}

.auth-back-link {
    margin-top: 17px;
    color: #817b73;
    font-size: 11px;
    text-align: center;
}

.auth-back-link a {
    text-decoration: none;
}


/* ---------- Alerts ---------- */

.auth-alert {
    margin: 0 0 18px;
    padding: 12px 14px;

    border: 1px solid transparent;
    border-radius: 8px;

    font-size: 12px;
    line-height: 1.7;
    overflow-wrap: anywhere;
}

.auth-alert[hidden],
.auth-alert:empty {
    display: none !important;
}

.auth-alert-error {
    border-color: #f4ceca;
    background: #fff0ee;
    color: var(--auth-danger);
}

.auth-alert-success {
    border-color: #ccebd7;
    background: #eaf7ef;
    color: var(--auth-success);
}

.auth-alert-warning {
    border-color: #f0dfae;
    background: #fff6df;
    color: #8a5a00;
}

.auth-alert-info {
    border-color: #d7e4f5;
    background: #eff6ff;
    color: #24558a;
}

.auth-success-link {
    display: inline-block;
    margin-top: 8px;

    color: var(--auth-success);
    font-weight: 750;
    text-underline-offset: 3px;
}


/* =========================================================
   OTP VERIFICATION SCREEN
   ========================================================= */

#student-otp-section {
    width: 100%;
    animation: auth-fade-in 220ms ease both;
}

#student-otp-section[hidden] {
    display: none !important;
}

#student-otp-section .auth-heading {
    margin-bottom: 25px;
}

#student-otp-form {
    gap: 19px;
}


/* Six-digit OTP input */

#student-email-otp {
    width: 100%;
    min-height: 62px;
    padding: 14px 12px;

    border: 1px solid var(--auth-border);
    border-radius: 10px;
    outline: none;

    background: #ffffff;
    color: #171717;

    font-size: 26px;
    font-weight: 800;
    letter-spacing: 10px;
    text-align: center;
    font-variant-numeric: tabular-nums;

    transition:
        border-color var(--auth-transition),
        box-shadow var(--auth-transition);
}

#student-email-otp::placeholder {
    color: #c8c4bd;
    letter-spacing: 8px;
}

#student-email-otp:hover {
    border-color: #c9c2b8;
}

#student-email-otp:focus {
    border-color: #171717;
    box-shadow: 0 0 0 3px rgba(30, 30, 30, 0.07);
}

#student-email-otp[aria-invalid="true"] {
    border-color: var(--auth-danger);
}

#student-email-otp:disabled {
    background: #f5f4f2;
    cursor: not-allowed;
}

#student-otp-resend {
    margin-top: -4px;
}

#student-otp-resend:disabled {
    opacity: 0.55;
}


/* ---------- Animations ---------- */

@keyframes auth-fade-in {
    from {
        opacity: 0;
        transform: translateY(6px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}


/* =========================================================
   TABLET
   ========================================================= */

@media (max-width: 950px) {
    .auth-shell {
        width: min(760px, calc(100% - 32px));
        grid-template-columns: 0.8fr 1.2fr;
        gap: 16px;
    }

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

    .auth-form-panel {
        padding: 30px;
    }

    .auth-brand-content h1 {
        font-size: 38px;
    }

    .auth-feature-list {
        gap: 13px;
    }
}


/* =========================================================
   MOBILE
   ========================================================= */

@media (max-width: 720px) {
    body {
        background: #ffffff;
    }

    .auth-shell {
        display: flex;
        flex-direction: column;
        gap: 0;

        width: 100%;
        min-height: 100vh;
        margin: 0;
        padding: 0;
    }

    .auth-brand-panel {
        padding: 20px 22px;

        border: none;
        border-radius: 0;

        background: var(--auth-bg);
    }

    .auth-brand-panel::after {
        width: 220px;
        height: 220px;
        right: -120px;
        bottom: -100px;
    }

    .auth-brand-content {
        margin: 20px 0 0;
    }

    .auth-brand-content h1 {
        font-size: 30px;
        letter-spacing: -1px;
    }

    .auth-brand-content > p {
        margin-bottom: 0;
        font-size: 12px;
    }

    .auth-feature-list,
    .auth-brand-footer {
        display: none;
    }

    .auth-form-panel {
        flex: 1;
        align-items: flex-start;

        padding: 28px 22px 36px;

        border: none;
        border-radius: 0;
        box-shadow: none;
    }

    .auth-form-container {
        max-width: 520px;
        margin: 0 auto;
    }

    .auth-form-row {
        gap: 12px;
    }
}


/* =========================================================
   SMALL MOBILE
   ========================================================= */

@media (max-width: 420px) {
    .auth-brand-panel {
        padding: 18px;
    }

    .auth-form-panel {
        padding: 25px 18px 32px;
    }

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

    .auth-brand-content h1 {
        font-size: 28px;
    }

    .auth-heading h2 {
        font-size: 27px;
    }

    #student-email-otp {
        min-height: 56px;
        font-size: 22px;
        letter-spacing: 8px;
    }
}


/* ---------- Accessibility ---------- */

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

/* =========================================================
   FOUNDEV STUDENT LOGIN — ADDITIONAL STYLES
   Append to css/institute-student-auth.css
   ========================================================= */

.auth-login-container {
    max-width: 440px;
}

.auth-login-container .auth-heading {
    margin-bottom: 30px;
}

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

.auth-label-row label {
    color: #292929;
    font-size: 12px;
    font-weight: 750;
}

.auth-inline-link {
    color: #45413b;
    font-size: 11px;
    font-weight: 700;
    text-decoration: none;
    white-space: nowrap;
}

.auth-inline-link:hover {
    color: #000;
    text-decoration: underline;
    text-underline-offset: 3px;
}

.auth-login-container #student-login-form {
    gap: 21px;
}

.auth-login-container .auth-checkbox {
    margin-top: -2px;
}

.auth-login-container #student-login-submit {
    margin-top: 2px;
}

.auth-admin-switch {
    margin-top: 18px;
    padding-top: 18px;
    border-top: 1px solid #e7e2da;
    line-height: 1.9;
}

.auth-admin-switch a {
    display: inline-block;
    margin-left: 3px;
}

.auth-login-container .auth-password-wrap {
    width: 100%;
}

.auth-login-container .auth-password-wrap input {
    padding-right: 68px;
}

.auth-login-container #student-email:focus,
.auth-login-container #student-password:focus {
    border-color: #252525;
    box-shadow: 0 0 0 3px rgba(30, 30, 30, 0.07);
}

@media (max-width: 720px) {
    .auth-login-container {
        max-width: 520px;
    }

    .auth-login-container .auth-heading {
        margin-bottom: 25px;
    }

    .auth-login-container #student-login-form {
        gap: 19px;
    }

    .auth-admin-switch a {
        display: block;
        margin: 4px 0 0;
    }
}

@media (max-width: 420px) {
    .auth-label-row {
        align-items: flex-start;
    }

    .auth-inline-link {
        font-size: 10px;
    }
}