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

body {
    margin: 0;
    /*font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen',*/
    /*'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue',*/
    /*sans-serif;*/
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    background-color: #040b16;
    background-image: url('../img/login-background.jpg');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    background-attachment: fixed;
}

/* CSS 변수 - 기본 테마 (Yellow) */
:root {
    --bg-gradient-start: #050d1f;
    --bg-gradient-end: #0c1f3a;
    --box-bg: #132a56;
    --box-shadow: rgba(9, 17, 35, 0.45);
    --main-title-color: #67c5ff;
    --login-title-color: #e5f2ff;
    --text-color: #dae6ff;
    --text-secondary: #9db6e3;
    --text-tertiary: #7b94c5;
    --border-color: #2f4d80;
    --input-focus-color: #62b2ff;
    --radio-accent: #62b2ff;
    --button-bg: #1f6fe5;
    --button-hover: #2d82ff;
    --button-active: #1452b8;
    --manual-button-bg: #1a3464;
    --manual-button-color: #67c5ff;
    --manual-button-border: #2e58a4;
    --manual-button-hover-bg: #214073;
    --manual-button-hover-border: #3e74d6;
    --manual-button-hover-color: #8ad8ff;
    --manual-button-active-bg: #192f5a;
    --manual-button-active-border: #2c5fc1;
    --manual-button-active-color: #70c1ff;
    --link-color: #67c5ff;
}

.login-container {
    position: relative;
    min-height: 100vh;
    padding: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.login-box {
    background: var(--box-bg);
    border-radius: 20px;
    width: 810px;
    height: 100%;
    padding: 30px;
    border: 3px solid rgba(103, 197, 255, 0.85);
    box-shadow: 0 20px 50px rgba(4, 9, 20, 0.38), 0 10px 25px rgba(13, 36, 76, 0.28), inset 0 1px 0 rgba(103, 197, 255, 0.2);
    z-index: 2;
}

.title-with-logo {
    width: 100%;
    text-align: center;
}

.main-title {
    font-size: 43px;
    font-weight: bold;
    color: var(--main-title-color);
    text-align: center;
    margin: 0;
    letter-spacing: -0.5px;
    width: 100%;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.login-section {
    width: 100%;
}

.login-header {
    display: flex;
    align-items: baseline;
    justify-content: center;
    gap: 18px;
    margin-bottom: 36px;
}

.login-title {
    font-size: 41px;
    font-weight: bold;
    color: var(--login-title-color);
    margin: 0;
}

.login-instruction {
    font-size: 14px;
    color: var(--text-secondary);
    margin: 0;
    padding-top: 11px;
}

.system-selection {
    display: flex;
    justify-content: center;
    gap: 27px;
    margin-bottom: 27px;
    padding-bottom: 18px;
    border-bottom: 1px solid var(--border-color);
}

.radio-label {
    display: flex;
    align-items: center;
    gap: 7px;
    cursor: pointer;
    font-size: 15px;
    color: var(--text-color);
}

.radio-label input[type="radio"] {
    width: 18px;
    height: 18px;
    cursor: pointer;
    accent-color: var(--radio-accent);
}

.radio-label input[type="radio"]:checked + span {
    color: var(--radio-accent);
    font-weight: 500;
}

.radio-label input[type="radio"]:disabled {
    cursor: not-allowed;
    opacity: 0.4;
}

.radio-label input[type="radio"]:disabled + span {
    color: #4a5c7a;
    cursor: not-allowed;
    opacity: 0.6;
}

.help-desk-section {
    text-align: center;
    margin-bottom: 18px;
    padding-bottom: 14px;
    border-bottom: 1px solid var(--border-color);
}

.help-desk-text {
    font-size: 18px;
    color: var(--text-color);
    margin: 0;
}

.auth-method-selection {
    display: flex;
    justify-content: center;
    margin-top: 14px;
}

.auth-fieldset {
    border: none;
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
    gap: 27px;
}

.login-form {
    display: flex;
    flex-direction: column;
    gap: 9px;
}

.input-group {
    position: relative;
    display: flex;
    align-items: center;
}

.input-icon {
    position: absolute;
    left: 14px;
    width: 18px;
    height: 18px;
    z-index: 1;
}

.input-icon path {
    stroke: var(--text-secondary);
}

.input-field {
    width: 100%;
    padding: 16px 16px 16px 50px;
    border: 1px solid var(--border-color);
    border-radius: 7px;
    font-size: 16px;
    transition: border-color 0.3s;
    background: var(--box-bg);
    color: var(--text-color);
}

.input-field:focus {
    outline: none;
    border-color: var(--input-focus-color);
}

.input-field::placeholder {
    color: var(--text-secondary);
}

.input-field:disabled {
    background: #0d1a2e;
    color: #4a5c7a;
    border-color: #1a2942;
    cursor: not-allowed;
    opacity: 0.6;
}

.input-field:disabled::placeholder {
    color: #3a4a62;
}

.login-button-container {
    display: flex;
    flex-direction: row;
    justify-content: center;
    align-items: center;
}

.login-button {
    width: 40%;
    padding: 16px;
    background: var(--button-bg);
    color: white;
    border: none;
    border-radius: 7px;
    font-size: 18px;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.3s;
    margin: 9px auto 0 auto;
    display: block;
}

.login-button:hover {
    background: var(--button-hover);
}

.login-button:active {
    background: var(--button-active);
}

.login-button:disabled {
    background: #1a2942;
    color: #4a5c7a;
    cursor: not-allowed;
    opacity: 0.6;
}

.login-button:disabled:hover {
    background: #1a2942;
}

.email-section,
.gpki-section,
.otp-section {
    margin-top: 20px;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 9px;
    height: 103px;
}

.otp-section {
    height: 100% !important;
}

.otp-input-group {
    position: relative;
    display: flex;
    align-items: center;
    flex: 1;
}

.otp-icon {
    position: absolute;
    left: 14px;
    width: 18px;
    height: 18px;
    z-index: 1;
}

.otp-input {
    width: 100%;
    padding: 16px 16px 16px 50px;
    border: 1px solid var(--border-color);
    border-radius: 7px;
    font-size: 16px;
    transition: border-color 0.3s;
    background: var(--box-bg);
    color: var(--text-color);
}

.otp-input:focus {
    outline: none;
    border-color: var(--input-focus-color);
}

.otp-input::placeholder {
    color: var(--text-secondary);
}

.otp-input:disabled {
    background: #0d1a2e;
    color: #4a5c7a;
    border-color: #1a2942;
    cursor: not-allowed;
    opacity: 0.6;
}

.otp-input:disabled::placeholder {
    color: #3a4a62;
}

.otp-register-button {
    padding: 16px 25px;
    background: var(--button-bg);
    color: white;
    border: none;
    border-radius: 7px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.3s;
    white-space: nowrap;
    flex-shrink: 0;
}

.otp-register-button:hover {
    background: var(--button-hover);
}

.otp-register-button:active {
    background: var(--button-active);
}

.otp-register-button:disabled {
    background: #1a2942;
    color: #4a5c7a;
    cursor: not-allowed;
    opacity: 0.6;
}

.otp-register-button:disabled:hover {
    background: #1a2942;
}

.otp-code-display {
    color: var(--text-color);
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 9px;
    text-align: center;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 11px;
}

.otp-code-label {
    color: var(--text-secondary);
    font-weight: 500;
}

.otp-code-value {
    color: var(--radio-accent);
    font-family: 'Courier New', monospace;
    letter-spacing: 2px;
    font-weight: 700;
}

/* Email Authentication Styles */
.email-timer {
    color: var(--text-color);
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 9px;
    text-align: center;
}

.email-input-group {
    position: relative;
    display: flex;
    align-items: center;
    flex: 1;
}

.email-icon {
    position: absolute;
    left: 14px;
    width: 18px;
    height: 18px;
    z-index: 1;
}

.email-input {
    width: 100%;
    padding: 16px 16px 16px 50px;
    border: 1px solid var(--border-color);
    border-radius: 7px;
    font-size: 16px;
    transition: border-color 0.3s;
    background: var(--box-bg);
    color: var(--text-color);
}

.email-input:focus {
    outline: none;
    border-color: var(--input-focus-color);
}

.email-input::placeholder {
    color: var(--text-secondary);
}

.email-input:disabled {
    background: #0d1a2e;
    color: #4a5c7a;
    border-color: #1a2942;
    cursor: not-allowed;
    opacity: 0.6;
}

.email-input:disabled::placeholder {
    color: #3a4a62;
}

.email-send-button {
    padding: 16px 25px;
    background: var(--button-bg);
    color: white;
    border: none;
    border-radius: 7px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.3s;
    white-space: nowrap;
    flex-shrink: 0;
}

.email-send-button:hover {
    background: var(--button-hover);
}

.email-send-button:active {
    background: var(--button-active);
}

.email-send-button:disabled {
    background: #1a2942;
    color: #4a5c7a;
    cursor: not-allowed;
    opacity: 0.6;
}

.email-send-button:disabled:hover {
    background: #1a2942;
}

/* GPKI Authentication Styles */
.gpki-buttons-container {
    display: flex;
    justify-content: center;
    gap: 14px;
    margin-bottom: 14px;
    width: 100%;
}

.gpki-button {
    padding: 16px 25px;
    background: var(--button-bg);
    color: white;
    border: none;
    border-radius: 7px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.3s;
    white-space: nowrap;
}

.gpki-button:hover {
    background: var(--button-hover);
}

.gpki-button:active {
    background: var(--button-active);
}

.gpki-button:disabled {
    background: #1a2942;
    color: #4a5c7a;
    cursor: not-allowed;
    opacity: 0.6;
}

.gpki-button:disabled:hover {
    background: #1a2942;
}

.gpki-download-link {
    text-align: center;
    margin-top: 9px;
}

.gpki-download-link a {
    font-size: 13px;
    color: var(--link-color);
    text-decoration: none;
    transition: color 0.3s;
}

.gpki-download-link a:hover {
    color: var(--text-color);
    text-decoration: underline;
}

.contact-section {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 18px;
    padding-top: 23px;
    border-top: 1px solid var(--border-color);
    gap: 18px;
}

.contact-info {
    flex: 1;
    text-align: left;
}

.manual-button {
    padding: 20px 25px;
    background: var(--manual-button-bg);
    color: var(--manual-button-color);
    border: 2px solid var(--manual-button-border);
    border-radius: 7px;
    font-size: 18px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    white-space: nowrap;
    flex-shrink: 0;
    height: fit-content;
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
}

.manual-button:hover {
    background: var(--manual-button-hover-bg);
    border-color: var(--manual-button-hover-border);
    color: var(--manual-button-hover-color);
}

.manual-button:active {
    background: var(--manual-button-active-bg);
    border-color: var(--manual-button-active-border);
    color: var(--manual-button-active-color);
}

.contact-title {
    font-size: 18px;
    color: var(--text-color);
    font-weight: 600;
    margin: 0 0 5px 0;
    line-height: 1.4;
}

.contact-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.contact-list li {
    font-size: 16px;
    color: var(--text-tertiary);
    line-height: 1.6;
}

.footer {
    margin-top: 9px;
    padding-top: 9px;
    border-top: 1px solid var(--border-color);
    text-align: center;
}

.copyright {
    font-size: 14px;
    color: var(--text-secondary);
    margin: 0 0 9px 0;
}

.footer-links {
    margin: 9px 0;
}

.privacy-link {
    font-size: 14px;
    color: var(--link-color);
    text-decoration: none;
}

.privacy-link:hover {
    text-decoration: underline;
}

@media (max-width: 768px) {
    .theme-selector {
        top: 10px;
        right: 10px;
        flex-direction: column;
        gap: 5px;
    }

    .theme-btn {
        padding: 6px 12px;
        font-size: 12px;
    }

    .login-box {
        padding: 40px 30px;
    }

    .login-title {
        font-size: 32px;
    }

    .login-header {
        flex-direction: column;
        gap: 10px;
    }

    .system-selection {
        flex-direction: column;
        gap: 15px;
    }

    .auth-fieldset {
        flex-direction: column;
        gap: 15px;
    }

    .contact-section {
        flex-direction: column;
        align-items: stretch;
    }

    .manual-button {
        width: 100%;
        justify-content: center;
    }

    .notice-popup {
        max-width: 90%;
        left: 20px !important;
        right: 20px !important;
        width: auto;
        transform: none !important;
        top: 20px !important;
    }
}

/* 공지사항 팝업 스타일 */
.notice-popup {
    display: block;
    position: fixed;
    top: 50px;
    left: 50px;
    transform: none;
    width: 500px;
    background: linear-gradient(155deg, rgba(14, 32, 67, 0.95) 0%, rgba(21, 52, 110, 0.92) 100%);
    border: 3px solid rgba(103, 197, 255, 0.85);
    border-radius: 18px;
    box-shadow: 0 22px 60px rgba(4, 9, 20, 0.45),
    0 12px 30px rgba(13, 36, 76, 0.35),
    inset 0 1px 0 rgba(103, 197, 255, 0.18);
    z-index: 10000;
    user-select: none;
    visibility: visible;
    opacity: 1;
    overflow: hidden;
}

.notice-popup::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 80px;
    background: radial-gradient(circle at top right, rgba(111, 205, 255, 0.35) 0%, transparent 55%);
    pointer-events: none;
}

.notice-popup.dragging {
    cursor: grabbing;
}

.notice-header {
    background: linear-gradient(132deg, #2d82ff 0%, rgba(53, 148, 255, 0.9) 100%);
    padding: 16px 28px;
    border-radius: 18px 18px 0 0;
    position: relative;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1) inset;
    overflow: hidden;
}

.notice-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.22) 0%, transparent 65%);
    border-radius: 18px 18px 0 0;
    pointer-events: none;
}

.notice-icon {
    width: 32px;
    height: 32px;
    color: #ffffff;
    filter: drop-shadow(0 1px 2px rgba(0, 0, 0, 0.2));
    animation: bell-swing 3s ease-in-out infinite;
    transform-origin: top center;
    flex-shrink: 0;
    display: block;
}

@keyframes bell-swing {

    0%,
    100% {
        transform: rotate(0deg);
    }

    5% {
        transform: rotate(5deg);
    }

    10% {
        transform: rotate(-5deg);
    }

    15% {
        transform: rotate(4deg);
    }

    20% {
        transform: rotate(-4deg);
    }

    25% {
        transform: rotate(0deg);
    }
}

.notice-header-text {
    color: #eaf4ff;
    font-size: 20px;
    font-weight: bold;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
    letter-spacing: 0.5px;
    flex-shrink: 0;
}

.notice-content {
    padding: 28px;
    text-align: center;
    background: linear-gradient(165deg, rgba(13, 30, 62, 0.9) 0%, rgba(12, 27, 56, 0.95) 100%);
}

.notice-title {
    font-size: 22px;
    font-weight: bold;
    color: var(--text-color);
    margin-bottom: 18px;
    text-align: center;
    letter-spacing: 0.5px;
}

.notice-message {
    margin-bottom: 22px;
    line-height: 1.8;
    text-align: center;
}

.notice-message p {
    font-size: 13px;
    color: var(--text-color);
    margin-bottom: 6px;
    text-align: center;
}

.notice-list {
    list-style: none;
    padding: 0;
    margin: 18px auto 22px auto;
    max-width: 550px;
    text-align: center;
}

.notice-list li {
    font-size: 15px;
    color: var(--text-color);
    margin-bottom: 10px;
    padding-left: 0;
    position: relative;
    text-align: center;
    padding: 5px 0;
}

.notice-list li::before {
    content: '○';
    margin-right: 8px;
    color: rgba(103, 197, 255, 0.9);
    font-weight: bold;
    position: relative;
    display: inline-block;
}

.notice-footer {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 15px;
    padding-top: 15px;
    border-top: 1px solid rgba(103, 197, 255, 0.25);
}

.notice-hide-today,
.notice-close {
    background: transparent;
    border: none;
    color: var(--text-color);
    font-size: 18px;
    cursor: pointer;
    padding: 8px 12px;
    transition: color 0.3s;
    display: flex;
    align-items: center;
    gap: 5px;
}

.notice-hide-today:hover,
.notice-close:hover {
    color: rgba(103, 197, 255, 0.9);
}

/* Dark 테마 공지사항 (주황색 계열 - 밝은 배경) */
body.theme-dark .notice-popup {
    border-color: #FF9800;
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.1),
    0 4px 12px rgba(255, 152, 0, 0.1),
    inset 0 1px 0 rgba(255, 255, 255, 0.5);
    background: #ffffff !important;
}

body.theme-dark .notice-header {
    background: linear-gradient(135deg, #FF9800 0%, rgba(255, 152, 0, 0.9) 100%);
}

body.theme-dark .notice-header-text {
    color: #ffffff;
}

body.theme-dark .notice-icon {
    color: #ffffff;
}

body.theme-dark .notice-content {
    background: #ffffff !important;
}

/* Purple 테마 공지사항 */
body.theme-green .notice-popup {
    border-color: #9C27B0;
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.25),
    0 4px 12px rgba(156, 39, 176, 0.15),
    inset 0 1px 0 rgba(255, 255, 255, 0.5);
}

body.theme-green .notice-header {
    background: linear-gradient(135deg, #9C27B0 0%, rgba(156, 39, 176, 0.9) 100%);
}

body.theme-green .notice-content {
    background: linear-gradient(to bottom, var(--box-bg) 0%, rgba(255, 255, 255, 0.98) 100%);
}

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* ===============================
   9. AUTHENTICATION SECTIONS
=============================== */
#multi-authenticate-type-container {
    margin-top: 18px;
    padding: 14px;
    background: rgba(102, 126, 234, 0.05);
    border-radius: 9px;
}

#multi-authenticate-type-container span {
    font-weight: 600;
}